fix package.json JSON.parse error

Author: DevHossamHassan

package.json

@@ -27,7 +27,7 @@
  "homepage": "https://github.com/Instabug/instabug-reactnative#readme",
  "rnpm": {
  "android": {
- "packageInstance": "new RNInstabugReactnativePackage("YOUR_ANDROID_APPLICATION_TOKEN",MainApplication.this,"button")"
+ "packageInstance": "new RNInstabugReactnativePackage(\"YOUR_ANDROID_APPLICATION_TOKEN\",MainApplication.this,\"button\")"
  }
  }
 }