Update dependency typescript to v3.6.4

Author: renovate-bot

src/package-lock.json

@@ -38,7 +38,7 @@
     "terser-webpack-plugin": "^1.2.1",
     "ts-loader": "5.3.3",
     "tslint": "5.15.0",
-    "typescript": "3.4.5",
+    "typescript": "3.6.4",
     "url-loader": "1.1.2",
     "webpack": "4.29.6",
     "webpack-cli": "3.3.0",