fixing install script

playground/package.json

   },
   "dependencies": {
     "react-native": "0.38.0",
-    "react": "15.4.1",
-    "react-native-navigation": "file:../"
+    "react": "15.4.1"
   },
+  "//": "use react-native-navigation: 2.x.x --> we are manually installing it from a script for quicker workflow",
   "devDependencies": {
     "detox": "4.x.x",
     "detox-server": "1.x.x",

playground/scripts/postinstall.js

 
 shellUtils.exec.execSync(`rm yarn.lock || true`);
 shellUtils.exec.execSync(`./scripts/ignoreReactWarnings.rb`);
-shellUtils.exec.execSync(`rm -rf node_modules/react-native-navigation/node_modules`);
-shellUtils.exec.execSync(`rm -rf node_modules/react-native-navigation/playground`);
+
+shellUtils.exec.execSync(`mkdir -p ./node_modules/react-native-navigation`);
+shellUtils.exec.execSync(`cd .. && npm pack`);
+//shellUtils.exec.execSync(`tar -xf ../react-native-navigation.tar`);

scripts/test.ios.js

 function run() {
   process.chdir('./playground');
   exec.execSync(`hardlink node_modules/react-native-navigation/ -u || true`);
-  const yarnCacheDir = exec.execSyncRead(`yarn cache dir`);
-  exec.execSync(`rm -rf ${yarnCacheDir}/*navigation*`);
   exec.execSync(`yarn install`);
   exec.execSync(`yarn run e2e release`);
   process.chdir('../');