chore(deps): pin dependency typescript to 3.6.4 (#916)

Author: renovate[bot]

package.json

@@ -88,7 +88,7 @@
     "standard-version": "7.0.0",
     "ts-node": "8.4.1",
     "tslint": "5.20.0",
-    "typescript": "~3.6.0",
+    "typescript": "3.6.4",
     "zone.js": "0.10.2"
   },
   "peerDependencies": {