build before release

package.json

     "pretest-e2e-ios": "npm run build",
     "test-e2e-ios": "node ./scripts/test.e2e.ios.js",
     "test-all": "node ./scripts/test.all.js",
+    "prerelease": "npm run build",
     "release": "node ./scripts/release.js"
   },
   "peerDependencies": {

scripts/clean.js

   exec.execSync(`rm -rf playground/android/app/build`);
   exec.execSync(`rm -rf AndroidE2E/android/build`);
   exec.execSync(`rm -rf AndroidE2E/android/app/build`);
+  exec.execSync(`rm -rf lib/dist`);
 }