ci: install cocoapods into usr/local/bin

Author: a7medev

.circleci/config.yml

@@ -46,9 +46,12 @@ commands:
         type: boolean
         default: false
     steps:
+      - run:
+          name: Uninstall Existing CocoaPods
+          command: gem uninstall -x cocoapods
       - run:
           name: Install CocoaPods
-          command: gem install cocoapods -v 1.14.0
+          command: gem install cocoapods:1.14.0
       - restore_cache:
           name: Restore Pods Cache
           keys: