for fixing circleCI issue, pulled corressponding changes from dev branch

Author: Sachin Maheshwari

config/constants/index.js

@@ -2,9 +2,8 @@ module.exports = (() => {
   const branch = process.env.CIRCLE_BRANCH || 'dev'
 
   // for security reason don't let to require any arbitrary file defined in process.env
-  if (['dev', 'master', 'qa'].indexOf(branch) < 0) {
-    throw Error('Unsupported CIRCLE_BRANCH value.')
+  if (['master', 'qa'].indexOf(branch) < 0) {
+    return require('./dev')
   }
-
   return require('./' + branch)
 })()