Merge pull request #54 from hipstersmoothie/renovate/typescript-3.x

Update dependency typescript to v3.8.3

Author: hipstersmoothie

package.json

@@ -57,7 +57,7 @@
     "lint-staged": "9.5.0",
     "prettier": "1.19.1",
     "strip-ansi": "5.2.0",
-    "typescript": "3.6.3"
+    "typescript": "3.8.3"
   },
   "ava": {
     "serial": true