hub 2.5.0

Features

• Have ci-status also query Checks API

Fixes

• Do not pass `--cmd' to vi editor to ensure compatibility with older vi
• Simplify cherry-picking commits from pull request URLs
• Allow single-character branches/tag names in hub compare
• Fix hub compare for Enterprise when <USER> is specified
• Support remote add -t BRANCH argument
• Bash shell completion fixes for git 2.18
• Documentation fixes