[Gemfile] Point to Core master for Podfile DSL 🎉

Gemfile

@@ -17,7 +17,7 @@ gem 'json', :git => 'https://github.com/segiddins/json.git', :branch => 'seg-1.7
 
 group :development do
   cp_gem 'claide',                'CLAide'
-  cp_gem 'cocoapods-core',        'Core', 'seg-podfile-refactor'
+  cp_gem 'cocoapods-core',        'Core'
   cp_gem 'cocoapods-deintegrate', 'cocoapods-deintegrate'
   cp_gem 'cocoapods-downloader',  'cocoapods-downloader'
   cp_gem 'cocoapods-plugins',     'cocoapods-plugins'

Gemfile.lock

@@ -7,8 +7,8 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Core.git
-  revision: bfcccd59d90bdc322df272af7b62e162f768905b
-  branch: seg-podfile-refactor
+  revision: ca0a5d504357e48da31b274430a966d64fd62078
+  branch: master
   specs:
     cocoapods-core (0.39.0)
       activesupport (>= 4.0.2)