v1.4.0

• The list of commits included in a mob branch is now truncated to a maximum of 5 entries to prevent the need for scrolling up in order to see the latest included changes.
• Show more informative error message when mob <cmd> is run outside of a git repository.
• Add environment variable MOB_TIMER which allows setting a default timer duration for mob start and mob timer commands.
• Add automatic co-author attribution. Mob will collect all committers from a WIP branch and add them as co-authors in the final WIP commit.
• added support for preventing mob start if there are unpushed commits
• better output if one passes a negative number for the timer