fix(build): lock awesome typescript loader (#3945)

Author: IlyaSurmay

package.json

@@ -100,6 +100,7 @@
     "@types/marked": "0.3.0",
     "@types/node": "8.5.1",
     "@types/webpack": "3.8.3",
+    "awesome-typescript-loader": "3.4.1",
     "bootstrap": "4.0.0",
     "chai": "4.1.2",
     "classlist-polyfill": "1.2.0",