[Config] Add environment variable COCOAPODS_SKIP_NEW_VERSION

CHANGELOG.md

@@ -22,6 +22,10 @@ To install release candidates run `[sudo] gem install cocoapods --pre`
   [Samuel Giddins](https://github.com/segiddins)
   [#3101](https://github.com/CocoaPods/CocoaPods/issues/3101)
 
+* Add environment variable `COCOAPODS_SKIP_NEW_VERSION` to disable new
+  version message
+  [Andrea Mazzini](https://github.com/andreamazz)
+  [#3364](https://github.com/CocoaPods/CocoaPods/issues/3364)
 
 ## 0.37.0.beta.1
 

lib/cocoapods/config.rb

@@ -19,7 +19,7 @@ module Pod
 
       :clean               => true,
       :integrate_targets   => true,
-      :new_version_message => true,
+      :new_version_message => !ENV['COCOAPODS_SKIP_NEW_VERSION'].nil?,
 
       :cache_root          => Pathname.new(Dir.home) + 'Library/Caches/CocoaPods',
     }