fix(typescript): pin typescript to 2.3.4

TS 2.4 brings on many different errors, we will wait until RxJs and
Angular core have compatible fixes to those breaking changes. Officially
angular is still on 2.2.2

Author: MarkPieszak

package.json

@@ -55,7 +55,7 @@
     "jquery": "^2.2.1",
     "json-loader": "^0.5.4",
 
-    "ng2-signalr": "^2.0.2",
+    "ng2-signalr": "2.0.4",
     "ngx-bootstrap": "^1.7.1",
     "node-sass": "^4.5.2",
     "preboot": "^4.5.2",
@@ -66,7 +66,7 @@
     "signalr": "^2.2.1",
     "style-loader": "^0.13.1",
     "to-string-loader": "^1.1.5",
-    "typescript": "^2.3.2",
+    "typescript": "2.3.4",
     "url-loader": "^0.5.7",
     "webpack": "^2.2.0",
     "webpack-hot-middleware": "^2.12.2",

tsconfig.json

@@ -7,6 +7,7 @@
     "sourceMap": false,
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true,
+    "noStrictGenericChecks": true,
     "lib": [
       "es2016",
       "dom"