chore(deps): update dependency typescript to v3.1.2

Author: renovate-bot

package.json

@@ -51,7 +51,7 @@
     "tslint-config-prettier": "1.15.0",
     "tslint-loader": "3.6.0",
     "typedoc": "0.12.0",
-    "typescript": "3.1.1",
+    "typescript": "3.1.2",
     "uuid": "3.3.2",
     "webpack": "4.20.2",
     "webpack-cli": "3.1.2"