diff --git a/Cargo.lock b/Cargo.lock
index d819cf9..7480071 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "addr2line"
 version = "0.13.0"
@@ -93,7 +95,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46254cf2fdcdf1badb5934448c1bcbe046a56537b3987d96c51a7afc5d03f293"
 dependencies = [
  "addr2line",
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
  "miniz_oxide",
  "object",
@@ -124,7 +126,7 @@ checksum = "c72a978d268b1d70b0e963217e60fdabd9523a941457a6c42a7315d15c7e89e5"
 dependencies = [
  "bitflags",
  "cexpr",
- "cfg-if",
+ "cfg-if 0.1.10",
  "clang-sys",
  "clap",
  "env_logger",
@@ -234,6 +236,12 @@ version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0e4cec68f03f32e44924783795810fa50a7035d8c8ebe78580ad7e6c703fba38"
 
+[[package]]
+name = "bytes"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4872d67bab6358e59559027aa3b9157c53d9358c51423c17554809a8858e0f8"
+
 [[package]]
 name = "cc"
 version = "1.0.41"
@@ -258,6 +266,12 @@ version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
 [[package]]
 name = "chrono"
 version = "0.4.15"
@@ -371,7 +385,7 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ba125de2af0df55319f41944744ad91c71113bf74a4646efff39afe1f6842db1"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
 ]
 
 [[package]]
@@ -392,7 +406,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
 dependencies = [
  "autocfg 1.0.0",
- "cfg-if",
+ "cfg-if 0.1.10",
  "crossbeam-utils",
  "lazy_static",
  "maybe-uninit",
@@ -406,7 +420,7 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "774ba60a54c213d409d5353bda12d49cd68d14e45036a285234c8d6f91f92570"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "crossbeam-utils",
  "maybe-uninit",
 ]
@@ -418,7 +432,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
 dependencies = [
  "autocfg 1.0.0",
- "cfg-if",
+ "cfg-if 0.1.10",
  "lazy_static",
 ]
 
@@ -471,7 +485,7 @@ version = "0.8.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a51b8cf747471cb9499b6d59e59b0444f4c90eba8968c4e44874e92b5b64ace2"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
 ]
 
 [[package]]
@@ -525,9 +539,9 @@ version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ed85775dcc68644b5c950ac06a2b23768d3bc9390464151aaf27136998dcf9e"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "winapi 0.3.9",
 ]
 
@@ -645,7 +659,7 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
  "wasi",
 ]
@@ -716,7 +730,7 @@ dependencies = [
  "http 0.2.1",
  "indexmap",
  "slab 0.4.2",
- "tokio 0.2.22",
+ "tokio 0.2.24",
  "tokio-util",
  "tracing",
 ]
@@ -879,7 +893,7 @@ dependencies = [
  "pin-project",
  "socket2",
  "time",
- "tokio 0.2.22",
+ "tokio 0.2.24",
  "tower-service",
  "tracing",
  "want 0.3.0",
@@ -894,7 +908,7 @@ dependencies = [
  "bytes 0.5.6",
  "hyper 0.13.7",
  "native-tls",
- "tokio 0.2.22",
+ "tokio 0.2.24",
  "tokio-tls",
 ]
 
@@ -930,6 +944,15 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
 [[package]]
 name = "iovec"
 version = "0.1.4"
@@ -1132,16 +1155,16 @@ checksum = "db65c6da02e61f55dae90a0ae427b2a5f6b3e8db09f58d10efab23af92592616"
 dependencies = [
  "arrayvec",
  "bitflags",
- "cfg-if",
+ "cfg-if 0.1.10",
  "ryu",
  "static_assertions",
 ]
 
 [[package]]
 name = "libc"
-version = "0.2.76"
+version = "0.2.126"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "755456fae044e6fa1ebbbd1b3e902ae19e73097ed4ed87bb79934a867c007bc3"
+checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
 
 [[package]]
 name = "libloading"
@@ -1190,6 +1213,15 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "lock_api"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88943dd7ef4a2e5a4bfa2753aaab3013e34ce2533d1996fb18ef591e315e2b3b"
+dependencies = [
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.3.9"
@@ -1205,7 +1237,7 @@ version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4fabed175da42fed1fa0746b0ea71f412aa9d35e76e95e59b192c64b9dc2bf8b"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
 ]
 
 [[package]]
@@ -1287,7 +1319,7 @@ version = "0.6.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fce347092656428bc8eaf6201042cb551b8d67855af7374542a92a0fbfcac430"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "fuchsia-zircon",
  "fuchsia-zircon-sys",
  "iovec",
@@ -1301,14 +1333,15 @@ dependencies = [
 ]
 
 [[package]]
-name = "mio-named-pipes"
-version = "0.1.7"
+name = "mio"
+version = "0.7.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0840c1c50fd55e521b247f949c241c9997709f23bd7f023b9762cd561e935656"
+checksum = "8067b404fe97c70829f082dec8bcf4f71225d7eaea1d8645349cb76fa06205cc"
 dependencies = [
+ "libc",
  "log 0.4.11",
- "mio",
- "miow 0.3.5",
+ "miow 0.3.7",
+ "ntapi",
  "winapi 0.3.9",
 ]
 
@@ -1320,7 +1353,7 @@ checksum = "afcb699eb26d4332647cc848492bbc15eafb26f08d0304550d5aa1f612e066f0"
 dependencies = [
  "iovec",
  "libc",
- "mio",
+ "mio 0.6.22",
 ]
 
 [[package]]
@@ -1337,11 +1370,10 @@ dependencies = [
 
 [[package]]
 name = "miow"
-version = "0.3.5"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07b88fb9795d4d36d62a012dfbf49a8f5cf12751f36d31a9dbe66d528e58979e"
+checksum = "b9f1c5b025cda876f66ef43a113f91ebc9f4ccef34843000e0adf6ebbab84e21"
 dependencies = [
- "socket2",
  "winapi 0.3.9",
 ]
 
@@ -1387,7 +1419,7 @@ version = "0.2.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2ba7c918ac76704fb42afcbbb43891e72731f3dcca3bef2a19786297baf14af7"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
  "winapi 0.3.9",
 ]
@@ -1415,7 +1447,7 @@ dependencies = [
  "serde 1.0.114",
  "serde_json",
  "sha2",
- "tokio 0.2.22",
+ "tokio 1.8.4",
  "toml",
  "typenum",
 ]
@@ -1431,6 +1463,15 @@ dependencies = [
  "version_check 0.9.2",
 ]
 
+[[package]]
+name = "ntapi"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c28774a7fd2fbb4f0babd8237ce554b73af68021b5f695a3cebd6c59bac0980f"
+dependencies = [
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.43"
@@ -1475,6 +1516,12 @@ version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ab52be62400ca80aa00285d25253d7f7c437b7375c4de678f5405d3afe82ca5"
 
+[[package]]
+name = "once_cell"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7709cef83f0c1f58f666e746a08b21e0085f7440fa6a29cc194d68aac97a4225"
+
 [[package]]
 name = "opaque-debug"
 version = "0.3.0"
@@ -1488,7 +1535,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8d575eff3665419f9b83678ff2815858ad9d11567e082f5ac1814baba4e2bcb4"
 dependencies = [
  "bitflags",
- "cfg-if",
+ "cfg-if 0.1.10",
  "foreign-types",
  "lazy_static",
  "libc",
@@ -1520,7 +1567,7 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f842b1982eb6c2fe34036a4fbfb06dd185a3f5c8edfaacdf7d1ea10b07de6252"
 dependencies = [
- "lock_api",
+ "lock_api 0.3.4",
  "parking_lot_core 0.6.2",
  "rustc_version",
 ]
@@ -1531,20 +1578,31 @@ version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3a704eb390aafdc107b0e392f56a82b668e3a71366993b5340f5833fd62505e"
 dependencies = [
- "lock_api",
+ "lock_api 0.3.4",
  "parking_lot_core 0.7.2",
 ]
 
+[[package]]
+name = "parking_lot"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d17b78036a60663b797adeaee46f5c9dfebb86948d1255007a1d6be0271ff99"
+dependencies = [
+ "instant",
+ "lock_api 0.4.6",
+ "parking_lot_core 0.8.5",
+]
+
 [[package]]
 name = "parking_lot_core"
 version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b876b1b9e7ac6e1a74a6da34d25c42e17e8862aa409cbbbdcfc8d86c6f3bc62b"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "cloudabi",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "rustc_version",
  "smallvec 0.6.13",
  "winapi 0.3.9",
@@ -1556,11 +1614,25 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d58c7c768d4ba344e3e8d72518ac13e259d7c7ade24167003b8488e10b6740a3"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "cloudabi",
  "libc",
- "redox_syscall",
- "smallvec 1.4.1",
+ "redox_syscall 0.1.57",
+ "smallvec 1.8.0",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d76e8e1493bcac0d2766c42737f34458f1c8c50c0d23bcb24ea953affb273216"
+dependencies = [
+ "cfg-if 1.0.0",
+ "instant",
+ "libc",
+ "redox_syscall 0.2.13",
+ "smallvec 1.8.0",
  "winapi 0.3.9",
 ]
 
@@ -1647,6 +1719,12 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "282adbf10f2698a7a77f8e983a74b2d18176c19a7fd32a45446139ae7b02b715"
 
+[[package]]
+name = "pin-project-lite"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"
+
 [[package]]
 name = "pin-utils"
 version = "0.1.0"
@@ -1676,11 +1754,11 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.19"
+version = "1.0.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04f5f085b5d71e2188cb8271e5da0161ad52c3f227a661a3c135fdf28e258b12"
+checksum = "c54b25569025b7fc9651de43004ae593a75ad88543b17178aa5e1b9c4f15f56f"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -1921,6 +1999,15 @@ version = "0.1.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
+[[package]]
+name = "redox_syscall"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62f25bc4c7e55e0b0b7a1d43fb893f4fa1361d0abe38b9ce4f323c2adfe6ef42"
+dependencies = [
+ "bitflags",
+]
+
 [[package]]
 name = "redox_users"
 version = "0.3.5"
@@ -1928,7 +2015,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "de0737333e7a9502c789a36d7c7fa6092a49895d4faa31ca5df163857ded2e9d"
 dependencies = [
  "getrandom",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "rust-argon2",
 ]
 
@@ -1991,11 +2078,11 @@ dependencies = [
  "mime_guess 2.0.3",
  "native-tls",
  "percent-encoding 2.1.0",
- "pin-project-lite",
+ "pin-project-lite 0.1.7",
  "serde 1.0.114",
  "serde_json",
  "serde_urlencoded",
- "tokio 0.2.22",
+ "tokio 0.2.24",
  "tokio-tls",
  "url 2.1.1",
  "wasm-bindgen",
@@ -2254,7 +2341,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2933378ddfeda7ea26f48c555bdad8bb446bf8a3d17832dc83e380d444cfb8c1"
 dependencies = [
  "block-buffer",
- "cfg-if",
+ "cfg-if 0.1.10",
  "cpuid-bool",
  "digest",
  "opaque-debug",
@@ -2311,9 +2398,9 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.4.1"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3757cb9d89161a2f24e1cf78efa0c1fcff485d18e3f55e0aa3480824ddaa0f3f"
+checksum = "f2dd574626839106c320a323308629dcb1acfc96e32a8cba364ddc61ac23ee83"
 
 [[package]]
 name = "socket2"
@@ -2321,9 +2408,9 @@ version = "0.3.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "03088793f677dce356f3ccc2edb1b314ad191ab702a5de3faf49304f7e104918"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "winapi 0.3.9",
 ]
 
@@ -2350,13 +2437,13 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "syn"
-version = "1.0.36"
+version = "1.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4cdb98bcb1f9d81d07b536179c269ea15999b5d14ea958196413869445bb5250"
+checksum = "0748dd251e24453cb8717f0354206b91557e4ec8703673a4b30208f2abaf1ebf"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -2393,10 +2480,10 @@ version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
  "rand 0.7.3",
- "redox_syscall",
+ "redox_syscall 0.1.57",
  "remove_dir_all",
  "winapi 0.3.9",
 ]
@@ -2485,7 +2572,7 @@ checksum = "5a09c0b5bb588872ab2f09afa13ee6e9dac11e10a0ec9e8e3ba39a5a5d530af6"
 dependencies = [
  "bytes 0.4.12",
  "futures",
- "mio",
+ "mio 0.6.22",
  "num_cpus",
  "tokio-codec",
  "tokio-current-thread",
@@ -2503,24 +2590,37 @@ dependencies = [
 
 [[package]]
 name = "tokio"
-version = "0.2.22"
+version = "0.2.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d34ca54d84bf2b5b4d7d31e901a8464f7b60ac145a284fba25ceb801f2ddccd"
+checksum = "099837d3464c16a808060bb3f02263b412f6fafcb5d01c533d309985fbeebe48"
 dependencies = [
  "bytes 0.5.6",
  "fnv",
  "futures-core",
  "iovec",
  "lazy_static",
+ "memchr",
+ "mio 0.6.22",
+ "pin-project-lite 0.1.7",
+ "slab 0.4.2",
+]
+
+[[package]]
+name = "tokio"
+version = "1.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50dae83881bc9b0403dd5b44ea9deed3e939856cc8722d5be37f0d6e5c6d53dd"
+dependencies = [
+ "autocfg 1.0.0",
+ "bytes 1.1.0",
  "libc",
  "memchr",
- "mio",
- "mio-named-pipes",
- "mio-uds",
+ "mio 0.7.14",
  "num_cpus",
- "pin-project-lite",
+ "once_cell",
+ "parking_lot 0.11.2",
+ "pin-project-lite 0.2.9",
  "signal-hook-registry",
- "slab 0.4.2",
  "tokio-macros",
  "winapi 0.3.9",
 ]
@@ -2557,7 +2657,7 @@ dependencies = [
  "futures",
  "iovec",
  "log 0.4.11",
- "mio",
+ "mio 0.6.22",
  "scoped-tls",
  "tokio 0.1.22",
  "tokio-executor",
@@ -2610,9 +2710,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-macros"
-version = "0.2.5"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0c3acc6aa564495a0f2e1d59fab677cd7f81a19994cfc7f3ad0e64301560389"
+checksum = "9724f9a975fb987ef7a3cd9be0350edcbe130698af5b8f7a631e23d42d052484"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2647,7 +2747,7 @@ dependencies = [
  "futures",
  "lazy_static",
  "log 0.4.11",
- "mio",
+ "mio 0.6.22",
  "num_cpus",
  "parking_lot 0.9.0",
  "slab 0.4.2",
@@ -2684,7 +2784,7 @@ dependencies = [
  "bytes 0.4.12",
  "futures",
  "iovec",
- "mio",
+ "mio 0.6.22",
  "tokio-io",
  "tokio-reactor",
 ]
@@ -2725,7 +2825,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a70f4fcd7b3b24fb194f837560168208f669ca8cb70d0c4b862944452396343"
 dependencies = [
  "native-tls",
- "tokio 0.2.22",
+ "tokio 0.2.24",
 ]
 
 [[package]]
@@ -2737,7 +2837,7 @@ dependencies = [
  "bytes 0.4.12",
  "futures",
  "log 0.4.11",
- "mio",
+ "mio 0.6.22",
  "tokio-codec",
  "tokio-io",
  "tokio-reactor",
@@ -2754,7 +2854,7 @@ dependencies = [
  "iovec",
  "libc",
  "log 0.4.11",
- "mio",
+ "mio 0.6.22",
  "mio-uds",
  "tokio-codec",
  "tokio-io",
@@ -2771,8 +2871,8 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "log 0.4.11",
- "pin-project-lite",
- "tokio 0.2.22",
+ "pin-project-lite 0.1.7",
+ "tokio 0.2.24",
 ]
 
 [[package]]
@@ -2796,7 +2896,7 @@ version = "0.1.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6d79ca061b032d6ce30c660fded31189ca0b9922bf483cd70759f13a2d86786c"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "log 0.4.11",
  "tracing-core",
 ]
@@ -2864,6 +2964,12 @@ dependencies = [
  "matches",
 ]
 
+[[package]]
+name = "unicode-ident"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d22af068fba1eb5edcb4aea19d382b2a3deb4c8f9d475c589b6ada9e0fd493ee"
+
 [[package]]
 name = "unicode-normalization"
 version = "0.1.13"
@@ -2975,7 +3081,7 @@ version = "0.2.67"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f0563a9a4b071746dd5aedbc3a28c6fe9be4586fb3fbadb67c400d4f53c6b16c"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "serde 1.0.114",
  "serde_json",
  "wasm-bindgen-macro",
@@ -3002,7 +3108,7 @@ version = "0.4.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95f8d235a77f880bcef268d379810ea6c0af2eacfa90b1ad5af731776e0c4699"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "js-sys",
  "wasm-bindgen",
  "web-sys",
diff --git a/Cargo.toml b/Cargo.toml
index dbc9356..a34eedf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ jsonrpc-http-server = "14.2.0"
 jsonrpc-derive = "14.2.1"
 rocksdb = "0.14.0"
 reqwest = { version = "0.10.7", features = ["json"] }
-tokio = { version = "0.2.22", features = ["full"] }
+tokio = { version = "1.8.4", features = ["full"] }
 jsonrpc-client-http = "0.5.0"
 jsonrpc-client-core = "0.5.0"
 jsonrpc-core-client = { version = "14.2.0", features = ["http"] }