chore(deps): update dependency typescript to v3.9.5 (#242)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package-lock.json

@@ -48,7 +48,7 @@
     "rimraf": "2.7.1",
     "source-map-support": "0.5.13",
     "tslint": "5.19.0",
-    "typescript": "3.6.2"
+    "typescript": "3.9.5"
   },
   "publishConfig": {
     "access": "public"