Fix dependency for doctrine/common

[lisachenko]

Go! requires "doctrine/common": "~2.2", but doctrine use branch aliasing "branch-alias": {"dev-master": "2.4.x-dev"}, so the last updates from master will be installed instead of stable version:

Loading composer repositories with package information
Updating dependencies
  - Installing doctrine/lexer (v1.0)
    Loading from cache

  - Installing doctrine/annotations (v1.0)
    Loading from cache

  - Installing doctrine/collections (v1.0)
    Loading from cache

  - Installing doctrine/cache (v1.0)
    Loading from cache

  - Installing doctrine/inflector (v1.0)
    Loading from cache

  - Installing doctrine/common (dev-master 185e6d7)
    Cloning 185e6d76765fe37ddb1a94aad8f51d97c92b0649

Additionally, doctrine introduces subpackages for 2.4.x. So autoloading for library is not working now, because composer can not be used for internal libraries of Go!