0.13.1

Bug Fixes

• Fix Unable to read data from Model.xcdatamodeld/.xccurrentversion when
  there are more Data model versions.
  Pim Snel

Enhancements

• [AbstractTarget] Added default value for default_configuration_name
  attribute.
  Fabio Pelosin
• [XCConfigurationList] common_resolved_build_setting will now ignore nil
  values. This is an heuristic which might not closely match Xcode behaviour.
  This is done because some information, like the SDK, is usually considered at
  the target level but it might actually differ in the build configurations.
  For example nothing prevents a target to build with the iOS sdk in one
  configuration and with the OS X in another.
  Fabio Pelosin
  CocoaPods/CocoaPods#1462