Fix the yoman-environment version

The release of 1.6.2 of yoman-environment break react-native (since there is no lib folder)
Yeoman will be removed from RN as #8197 anyway.
This closes #8610.

Thanks @cpsubrian

Author: tychota

package.json

@@ -187,7 +187,7 @@
     "xcode": "^0.8.2",
     "xmldoc": "^0.4.0",
     "yargs": "^3.24.0",
-    "yeoman-environment": "^1.2.7",
+    "yeoman-environment": "~1.2.7",
     "yeoman-generator": "^0.20.3"
   },
   "devDependencies": {