diff --git a/Cargo.lock b/Cargo.lock
index 005c643..8c81f0c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,20 +1,13 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "arrayref"
 version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a4c527152e37cf757a3f78aae5a06fbeefdb07ccc535c980a3208ee3060dd544"
 
-[[package]]
-name = "arrayvec"
-version = "0.4.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8d73f9beda665eaa98ab9e4f7442bd4e7de6652587de55b2525e52e29c1b0ba"
-dependencies = [
- "nodrop",
-]
-
 [[package]]
 name = "arrayvec"
 version = "0.5.1"
@@ -27,6 +20,12 @@ version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b671c8fb71b457dd4ae18c4ba1e59aa81793daacc361d82fcd410cef0d491875"
 
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
 [[package]]
 name = "backtrace"
 version = "0.3.37"
@@ -199,24 +198,26 @@ checksum = "e7ca8a5221364ef15ce201e8ed2f609fc312682a8f4e0e3d4aa5879764e0fa3b"
 
 [[package]]
 name = "crossbeam-deque"
-version = "0.7.1"
+version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b18cd2e169ad86297e6bc0ad9aa679aee9daa4f19e8163860faf7c164e4f5a71"
+checksum = "c20ff29ded3204c5106278a81a38f4b482636ed4fa1e6cfbeef193291beb29ed"
 dependencies = [
  "crossbeam-epoch",
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
+ "maybe-uninit",
 ]
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.7.2"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fedcd6772e37f3da2a9af9bf12ebe046c0dfe657992377b4df982a2b54cd37a9"
+checksum = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
 dependencies = [
- "arrayvec 0.4.11",
+ "autocfg 1.1.0",
  "cfg-if",
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
  "lazy_static",
+ "maybe-uninit",
  "memoffset",
  "scopeguard 1.0.0",
 ]
@@ -227,7 +228,7 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c979cd6cfe72335896575c6b5688da489e420d36a27a0b9eb0c73db574b4a4b"
 dependencies = [
- "crossbeam-utils",
+ "crossbeam-utils 0.6.6",
 ]
 
 [[package]]
@@ -240,6 +241,17 @@ dependencies = [
  "lazy_static",
 ]
 
+[[package]]
+name = "crossbeam-utils"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
+dependencies = [
+ "autocfg 1.1.0",
+ "cfg-if",
+ "lazy_static",
+]
+
 [[package]]
 name = "crunchy"
 version = "0.2.2"
@@ -658,6 +670,12 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "maybe-uninit"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
+
 [[package]]
 name = "memchr"
 version = "2.2.1"
@@ -743,12 +761,6 @@ dependencies = [
  "winapi 0.3.8",
 ]
 
-[[package]]
-name = "nodrop"
-version = "0.1.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f9667ddcc6cc8a43afc9b7917599d7216aa09c463919ea32c59ed6cac8bc945"
-
 [[package]]
 name = "nom"
 version = "4.2.3"
@@ -765,7 +777,7 @@ version = "0.1.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b85e541ef8255f6cf42bbfe4ef361305c6c135d10919ecc26126c4e5ae94bc09"
 dependencies = [
- "autocfg",
+ "autocfg 0.1.6",
  "num-traits",
 ]
 
@@ -775,7 +787,7 @@ version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ba9a427cfca2be13aa6f6403b0b7e7368fe982bfa16fccc450ce74c46cd9b32"
 dependencies = [
- "autocfg",
+ "autocfg 0.1.6",
 ]
 
 [[package]]
@@ -819,7 +831,7 @@ version = "0.9.49"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f4fad9e54bd23bd4cbbe48fdc08a1b8091707ac869ef8508edea2fec77dcc884"
 dependencies = [
- "autocfg",
+ "autocfg 0.1.6",
  "cc",
  "libc",
  "pkg-config",
@@ -841,7 +853,7 @@ version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75c823fdae1bb5ff5708ee61a62697e6296175dc671710876871c853f48592b3"
 dependencies = [
- "arrayvec 0.5.1",
+ "arrayvec",
  "bitvec",
  "byte-slice-cast",
  "parity-scale-codec-derive",
@@ -952,7 +964,7 @@ version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6d71dacdc3c88c1fde3885a3be3fbab9f35724e6ce99467f7d9c5026132184ca"
 dependencies = [
- "autocfg",
+ "autocfg 0.1.6",
  "libc",
  "rand_chacha 0.1.1",
  "rand_core 0.4.2",
@@ -984,7 +996,7 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "556d3a1ca6600bfcbab7c7c91ccb085ac7fbbcd70e008a98742e7847f4f7bcef"
 dependencies = [
- "autocfg",
+ "autocfg 0.1.6",
  "rand_core 0.3.1",
 ]
 
@@ -1080,7 +1092,7 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "abf9b09b01790cfe0364f52bf32995ea3c39f4d2dd011eac241d2914146d0b44"
 dependencies = [
- "autocfg",
+ "autocfg 0.1.6",
  "rand_core 0.4.2",
 ]
 
@@ -1477,7 +1489,7 @@ version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0f27ee0e6db01c5f0b2973824547ce7e637b2ed79b891a9677b0de9bd532b6ac"
 dependencies = [
- "crossbeam-utils",
+ "crossbeam-utils 0.6.6",
  "futures",
 ]
 
@@ -1509,7 +1521,7 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6af16bfac7e112bea8b0442542161bfc41cbfa4466b580bdda7d18cb88b911ce"
 dependencies = [
- "crossbeam-utils",
+ "crossbeam-utils 0.6.6",
  "futures",
  "lazy_static",
  "log",
@@ -1554,7 +1566,7 @@ checksum = "90ca01319dea1e376a001e8dc192d42ebde6dd532532a5bad988ac37db365b19"
 dependencies = [
  "crossbeam-deque",
  "crossbeam-queue",
- "crossbeam-utils",
+ "crossbeam-utils 0.6.6",
  "futures",
  "log",
  "num_cpus",
@@ -1569,7 +1581,7 @@ version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2106812d500ed25a4f38235b9cae8f78a09edf43203e16e59c3b769a342a60e"
 dependencies = [
- "crossbeam-utils",
+ "crossbeam-utils 0.6.6",
  "futures",
  "slab",
  "tokio-executor",