fix(deps): update dependency typescript to v4 (#320)

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

Author: renovate[bot]

package-lock.json

@@ -34,11 +34,11 @@
     "prettier": "^1.19.1",
     "react": "^16.13.1",
     "standard-version": "^9.0.0",
-    "typescript": "^3.9.7"
+    "typescript": "^4.0.2"
   },
   "peerDependencies": {
     "eslint": "^7.0.0",
-    "typescript": "^3.3.3333"
+    "typescript": "^3.3.3333 || ^4.0.0"
   },
   "dependencies": {
     "@typescript-eslint/eslint-plugin": "^3.9.1",