Up API version to v3

app/views/layouts/_init_auto_complete.html.haml

 :javascript
   $(function() {
-    GitLab.GfmAutoComplete.Members.url = "#{ "/api/v2/projects/#{@project.id}/members" if @project }";
+    GitLab.GfmAutoComplete.Members.url = "#{ "/api/v3/projects/#{@project.id}/members" if @project }";
     GitLab.GfmAutoComplete.Members.params.private_token = "#{current_user.private_token}";
     GitLab.GfmAutoComplete.Emoji.data = #{raw emoji_autocomplete_source};

doc/api/README.md

@@ -15,7 +15,7 @@ API requests should be prefixed with `api` and the API version. The API version
 Example of a valid API request:
 ```
-GET http://example.com/api/v2/projects?private_token=QVy1PB7sTxfy4pqfZM1U
+GET http://example.com/api/v3/projects?private_token=QVy1PB7sTxfy4pqfZM1U
 ```
 The API uses JSON to serialize data. You don't need to specify `.json` at the end of API URL.

lib/api.rb

@@ -2,7 +2,7 @@ Dir["#{Rails.root}/lib/api/*.rb"].each {|file| require file}
 module Gitlab
   class API < Grape::API
-    version 'v2', using: :path
+    version 'v3', using: :path
     rescue_from ActiveRecord::RecordNotFound do
       rack_response({'message' => '404 Not found'}.to_json, 404)