chore: Update ts version

Author: zombieJ

package.json

@@ -64,7 +64,8 @@
     "prettier": "^2.1.1",
     "react": "^16.0.0",
     "react-dom": "^16.0.0",
-    "regenerator-runtime": "^0.13.7"
+    "regenerator-runtime": "^0.13.7",
+    "typescript": "^4.0.3"
   },
   "peerDependencies": {
     "react": "^16.0.0",