Bugfixes:
- #2881 Revert "Merge pull request #2746 from mbad0la:develop" Sep->Sept
- #2868 Add format and parse token Y, so it actually works
- #2865 Use typeof checks for undefined for global variables
- #2858 Fix Date mocking regression introduced in 2.11.0
- #2864 Include changelog in npm release
- #2830 dep: add grunt-cli
- #2869 Fix months parsing for some locales
Title should be 2.11.1