diff --git a/yarn.lock b/yarn.lock
index b93cf97..bff366a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -26,9 +26,9 @@
     minimist "^1.2.0"
     rxjs "^5.5.2"
 
-"@angular/animations@^5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@angular/animations/-/animations-5.0.0.tgz#b5ad199c67f93f759544477effe6679e154991fb"
+"@angular/animations@^4.4.6":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/animations/-/animations-4.4.7.tgz#4d108e89cafe8d0d193385e7aa1b3b00e8199ade"
   dependencies:
     tslib "^1.7.1"
 
@@ -101,42 +101,41 @@
   optionalDependencies:
     node-sass "^4.3.0"
 
-"@angular/common@^5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@angular/common/-/common-5.0.0.tgz#f96d66a517b995d1ba9b28309f15c2e359675825"
+"@angular/common@^4.4.6":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/common/-/common-4.4.7.tgz#c2fd3e68a05f661c3d2a040fdad00af4119bb852"
   dependencies:
     tslib "^1.7.1"
 
-"@angular/compiler-cli@^5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@angular/compiler-cli/-/compiler-cli-5.0.0.tgz#0ecbb937d84a4f8dd94f0c2a47b07d2e4694c853"
+"@angular/compiler-cli@^4.4.6":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/compiler-cli/-/compiler-cli-4.4.7.tgz#18e698f6da6166e75df7f782bd26f1f0f34e39f9"
   dependencies:
-    chokidar "^1.4.2"
+    "@angular/tsc-wrapped" "4.4.7"
     minimist "^1.2.0"
     reflect-metadata "^0.1.2"
-    tsickle "^0.24.0"
 
-"@angular/compiler@^5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@angular/compiler/-/compiler-5.0.0.tgz#b9ffbf18c8a39d8b7dacec473193a90e24cc2bc9"
+"@angular/compiler@^4.4.6":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/compiler/-/compiler-4.4.7.tgz#c90b0a8d450e1ea19a5a60309ca03b0925a2f269"
   dependencies:
     tslib "^1.7.1"
 
-"@angular/core@^5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@angular/core/-/core-5.0.0.tgz#4f976a225f7dddf34992f2cad824c9543a46f4c8"
+"@angular/core@^4.4.6":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/core/-/core-4.4.7.tgz#18bdc17bec7bdccb6424402fc90550e15a6d221b"
   dependencies:
     tslib "^1.7.1"
 
-"@angular/forms@^5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@angular/forms/-/forms-5.0.0.tgz#c7fddfa35396759ae9852920a30cdda8c41ed1de"
+"@angular/forms@^4.4.6":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/forms/-/forms-4.4.7.tgz#f9503ad8f4bd77a7ba93714afea46c4944887758"
   dependencies:
     tslib "^1.7.1"
 
-"@angular/http@^5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@angular/http/-/http-5.0.0.tgz#0728a2be0cfbb078727c5eb87d4c85d53fec9a51"
+"@angular/http@^4.4.6":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/http/-/http-4.4.7.tgz#8fab2eb121cda38ad9c568e5268f7d69ab8b904e"
   dependencies:
     tslib "^1.7.1"
 
@@ -146,24 +145,30 @@
   dependencies:
     tslib "^1.7.1"
 
-"@angular/platform-browser-dynamic@^5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@angular/platform-browser-dynamic/-/platform-browser-dynamic-5.0.0.tgz#887e106c8b103b0415cf6156a425da6d83f4c89d"
+"@angular/platform-browser-dynamic@^4.4.6":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/platform-browser-dynamic/-/platform-browser-dynamic-4.4.7.tgz#c10676f49de5ac604e326cba440ff6a6af6588fe"
   dependencies:
     tslib "^1.7.1"
 
-"@angular/platform-browser@^5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@angular/platform-browser/-/platform-browser-5.0.0.tgz#c7038f7cde80705b62014897231e182eec976fed"
+"@angular/platform-browser@^4.4.6":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/platform-browser/-/platform-browser-4.4.7.tgz#76d5af9438d6a349ea0b5fe97bd8fbe1fdc216a9"
   dependencies:
     tslib "^1.7.1"
 
-"@angular/router@^5.0.0":
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/@angular/router/-/router-5.0.0.tgz#fe4b521a6738408bce30f93a53499140c93a4f76"
+"@angular/router@^4.4.6":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/router/-/router-4.4.7.tgz#b642ae00f5f93f5e864f3d2b3e735509cd814c05"
   dependencies:
     tslib "^1.7.1"
 
+"@angular/tsc-wrapped@4.4.7":
+  version "4.4.7"
+  resolved "https://registry.yarnpkg.com/@angular/tsc-wrapped/-/tsc-wrapped-4.4.7.tgz#d4d9ffb0a689a9ce3009012446a5ae382941f06d"
+  dependencies:
+    tsickle "^0.21.0"
+
 "@ngtools/json-schema@1.1.0", "@ngtools/json-schema@^1.1.0":
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/@ngtools/json-schema/-/json-schema-1.1.0.tgz#c3a0c544d62392acc2813a42c8a0dc6f58f86922"
@@ -1098,7 +1103,7 @@ charenc@~0.0.1:
   version "0.0.2"
   resolved "https://registry.yarnpkg.com/charenc/-/charenc-0.0.2.tgz#c0a1d2f3a7092e03774bfa83f14c0fc5790a8667"
 
-chokidar@^1.4.1, chokidar@^1.4.2, chokidar@^1.6.0, chokidar@^1.7.0:
+chokidar@^1.4.1, chokidar@^1.6.0, chokidar@^1.7.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-1.7.0.tgz#798e689778151c8076b4b360e5edd28cda2bb468"
   dependencies:
@@ -1385,28 +1390,24 @@ copy-webpack-plugin@^4.1.1:
     minimatch "^3.0.4"
     node-dir "^0.1.10"
 
-core-js@^2.2.0, core-js@^2.4.0:
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.5.0.tgz#569c050918be6486b3837552028ae0466b717086"
-
-core-js@^2.5.1:
+core-js@^2.2.0, core-js@^2.4.0, core-js@^2.5.1:
   version "2.5.1"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.5.1.tgz#ae6874dc66937789b80754ff5428df66819ca50b"
 
-core-js@~2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.3.0.tgz#fab83fbb0b2d8dc85fa636c4b9d34c75420c6d65"
-
 core-object@^3.1.0:
   version "3.1.5"
   resolved "https://registry.yarnpkg.com/core-object/-/core-object-3.1.5.tgz#fa627b87502adc98045e44678e9a8ec3b9c0d2a9"
   dependencies:
     chalk "^2.0.0"
 
-core-util-is@1.0.2, core-util-is@~1.0.0:
+core-util-is@1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
+core-util-is@~1.0.0:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.3.tgz#a6042d3634c2b27e9328f837b965fac83808db85"
+
 cosmiconfig@^2.1.0, cosmiconfig@^2.1.1:
   version "2.2.2"
   resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-2.2.2.tgz#6173cebd56fac042c1f4390edf7af6c07c7cb892"
@@ -2283,10 +2284,6 @@ es6-map@^0.1.3:
     es6-symbol "~3.1.1"
     event-emitter "~0.3.5"
 
-es6-promise@~3.0.2:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-3.0.2.tgz#010d5858423a5f118979665f46486a95c6ee2bb6"
-
 es6-promise@~4.0.3:
   version "4.0.5"
   resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.0.5.tgz#7882f30adde5b240ccfa7f7d78c548330951ae42"
@@ -3168,7 +3165,7 @@ inflight@^1.0.4:
     once "^1.3.0"
     wrappy "1"
 
-inherits@2, inherits@2.0.3, inherits@^2.0.1, inherits@^2.0.3, inherits@~2.0.0, inherits@~2.0.1, inherits@~2.0.3:
+inherits@2, inherits@2.0.3, inherits@^2.0.1, inherits@^2.0.3, inherits@~2.0.0, inherits@~2.0.1:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
 
@@ -3176,6 +3173,10 @@ inherits@2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.1.tgz#b17d08d326b4423e568eff719f91b0b1cbdf69f1"
 
+inherits@~2.0.3:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
+
 ini@^1.3.4, ini@~1.3.0:
   version "1.3.4"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.4.tgz#0537cb79daf59b59a1a517dff706c86ec039162e"
@@ -3621,14 +3622,13 @@ jsprim@^1.2.2:
     verror "1.10.0"
 
 jszip@^3.1.3:
-  version "3.1.4"
-  resolved "https://registry.yarnpkg.com/jszip/-/jszip-3.1.4.tgz#fc323fe41bb1730348d20dd022aa4d8b57cbbcf9"
+  version "3.10.1"
+  resolved "https://registry.yarnpkg.com/jszip/-/jszip-3.10.1.tgz#34aee70eb18ea1faec2f589208a157d1feb091c2"
   dependencies:
-    core-js "~2.3.0"
-    es6-promise "~3.0.2"
-    lie "~3.1.0"
+    lie "~3.3.0"
     pako "~1.0.2"
-    readable-stream "~2.0.6"
+    readable-stream "~2.3.6"
+    setimmediate "^1.0.5"
 
 karma-chrome-launcher@~2.2.0:
   version "2.2.0"
@@ -3778,9 +3778,9 @@ license-webpack-plugin@^1.0.0:
   dependencies:
     ejs "^2.5.7"
 
-lie@~3.1.0:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/lie/-/lie-3.1.1.tgz#9a436b2cc7746ca59de7a41fa469b3efb76bd87e"
+lie@~3.3.0:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/lie/-/lie-3.3.0.tgz#dcf82dee545f46074daf200c7c1c5a08e0f40f6a"
   dependencies:
     immediate "~3.0.5"
 
@@ -4460,8 +4460,8 @@ pako@~0.2.0:
   resolved "https://registry.yarnpkg.com/pako/-/pako-0.2.9.tgz#f3f7522f4ef782348da8161bad9ecfd51bf83a75"
 
 pako@~1.0.2:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/pako/-/pako-1.0.6.tgz#0101211baa70c4bca4a0f63f2206e97b7dfaf258"
+  version "1.0.11"
+  resolved "https://registry.yarnpkg.com/pako/-/pako-1.0.11.tgz#6c9599d340d54dfd3946380252a35705a6b992bf"
 
 parallel-transform@^1.1.0:
   version "1.1.0"
@@ -4964,6 +4964,10 @@ process-nextick-args@~1.0.6:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-1.0.7.tgz#150e20b756590ad3f91093f25a4f2ad8bff30ba3"
 
+process-nextick-args@~2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-2.0.1.tgz#7820d9b16120cc55ca9ae7792680ae7dba6d7fe2"
+
 process@^0.11.0:
   version "0.11.10"
   resolved "https://registry.yarnpkg.com/process/-/process-0.11.10.tgz#7332300e840161bda3e69a1d1d91a7d4bc16f182"
@@ -5169,16 +5173,16 @@ read-pkg@^2.0.0:
     normalize-package-data "^2.3.2"
     path-type "^2.0.0"
 
-"readable-stream@1 || 2", readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.4, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.4, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.2.6, readable-stream@^2.2.9:
-  version "2.3.3"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.3.tgz#368f2512d79f9d46fdfc71349ae7878bbc1eb95c"
+"readable-stream@1 || 2", readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.4, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.4, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.2.6, readable-stream@^2.2.9, readable-stream@~2.3.6:
+  version "2.3.7"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.7.tgz#1eca1cf711aef814c04f62252a36a62f6cb23b57"
   dependencies:
     core-util-is "~1.0.0"
     inherits "~2.0.3"
     isarray "~1.0.0"
-    process-nextick-args "~1.0.6"
+    process-nextick-args "~2.0.0"
     safe-buffer "~5.1.1"
-    string_decoder "~1.0.3"
+    string_decoder "~1.1.1"
     util-deprecate "~1.0.1"
 
 readable-stream@1.0, readable-stream@~1.0.2:
@@ -5190,7 +5194,7 @@ readable-stream@1.0, readable-stream@~1.0.2:
     isarray "0.0.1"
     string_decoder "~0.10.x"
 
-readable-stream@~2.0.0, readable-stream@~2.0.6:
+readable-stream@~2.0.0:
   version "2.0.6"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.0.6.tgz#8f90341e68a53ccc928788dacfcd11b36eb9b78e"
   dependencies:
@@ -5429,10 +5433,14 @@ rxjs@^5.5.2:
   dependencies:
     symbol-observable "^1.0.1"
 
-safe-buffer@5.1.1, safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
+safe-buffer@5.1.1, safe-buffer@^5.0.1, safe-buffer@^5.1.0:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"
 
+safe-buffer@~5.1.0, safe-buffer@~5.1.1:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
+
 sass-graph@^2.1.1:
   version "2.2.4"
   resolved "https://registry.yarnpkg.com/sass-graph/-/sass-graph-2.2.4.tgz#13fbd63cd1caf0908b9fd93476ad43a51d1e0b49"
@@ -5581,7 +5589,7 @@ set-immediate-shim@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/set-immediate-shim/-/set-immediate-shim-1.0.1.tgz#4b2b1b27eb808a9f8dcc481a58e5e56f599f3f61"
 
-setimmediate@^1.0.4:
+setimmediate@^1.0.4, setimmediate@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/setimmediate/-/setimmediate-1.0.5.tgz#290cbb232e306942d7d7ea9b83732ab7856f8285"
 
@@ -5872,9 +5880,9 @@ string_decoder@^0.10.25, string_decoder@~0.10.x:
   version "0.10.31"
   resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
 
-string_decoder@~1.0.3:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.0.3.tgz#0fc67d7c141825de94282dd536bec6b9bce860ab"
+string_decoder@~1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.1.1.tgz#9cf1611ba62685d7030ae9e4ba34149c3af03fc8"
   dependencies:
     safe-buffer "~5.1.0"
 
@@ -6108,9 +6116,9 @@ tsconfig@^6.0.0:
     strip-bom "^3.0.0"
     strip-json-comments "^2.0.0"
 
-tsickle@^0.24.0:
-  version "0.24.1"
-  resolved "https://registry.yarnpkg.com/tsickle/-/tsickle-0.24.1.tgz#039343b205bf517a333b0703978892f80a7d848e"
+tsickle@^0.21.0:
+  version "0.21.6"
+  resolved "https://registry.yarnpkg.com/tsickle/-/tsickle-0.21.6.tgz#53b01b979c5c13fdb13afb3fb958177e5991588d"
   dependencies:
     minimist "^1.2.0"
     mkdirp "^0.5.1"