chore: fix missing typescript npm command

Author: ian-wd

package.json

@@ -46,7 +46,7 @@
     "example:android": "cd example && npm run android",
     "example:ios": "cd example && npm run ios",
     "test": "jest",
-    "typecheck": "tsc --noEmit",
+    "typescript": "tsc --noEmit",
     "lint": "eslint \"**/*.{js,ts,tsx}\"",
     "clean": "del-cli android/build example/android/build example/android/app/build example/ios/build lib",
     "build": "bob build",