fix script

scripts/test.e2e.ios.js

 function buildProjForDetox() {
   const scheme = release ? `playground_release` : `playground`;
 
-  const cmd = `cd ./playground/ios && xcodebuild
+  const cmd = `RCT_NO_LAUNCH_PACKAGER=true
+            cd ./playground/ios && xcodebuild
             -scheme ${scheme}
             ${release ? 'clean build' : 'build'}
             -project playground.xcodeproj