Downgraded detox in order to fix e2e

package.json

     "@types/react": "16.x.x",
     "@types/react-native": "0.51.x",
     "@types/react-test-renderer": "16.x.x",
-    "detox": "8.x.x",
+    "detox": "8.1.6",
     "handlebars": "4.x.x",
     "jest": "22.x.x",
     "react": "16.2.0",