Warn for deprecated specs on outdated
Refactored Command::Outdated to make it stub-able
Update Changelog
Merge branch 'warn-for-deprecated-specs-on-outdated' of https://github.com/segiddins/CocoaPods into segiddins-warn-for-deprecated-specs-on-outdated

* 'warn-for-deprecated-specs-on-outdated' of https://github.com/segiddins/CocoaPods:
  Update Changelog
  Refactored Command::Outdated to make it stub-able
  Warn for deprecated specs on outdated

Conflicts:
	CHANGELOG.md
Merge branch 'segiddins-warn-for-deprecated-specs-on-outdated'

* segiddins-warn-for-deprecated-specs-on-outdated:
  Update Changelog
  Refactored Command::Outdated to make it stub-able
  Warn for deprecated specs on outdated