chore(deps): update dependency typescript to v3.4.2

Author: renovate-bot

package-lock.json

@@ -102,7 +102,7 @@
     "tsickle": "0.34.0",
     "tslib": "1.9.3",
     "tslint": "5.14.0",
-    "typescript": "3.2.4"
+    "typescript": "3.4.2"
   },
   "cordova": {
     "plugins": {