v4.2.0

Features

• Add PHP item (#91)
• Add chruby item (#100)

Bug fixes

• Load fish_prompt only if session is interactive (#107 - @chvolkmann)
• Make virtual_env item smarter in avoiding generic names (#97)

Internal

• Updated code for Fish 3.2.0
• Refactor printing logic, much faster now (#111)
• Use builtin disown instead of function, small speed increase
• Don't even create fish_mode_prompt function, tiny speed improvement

CI/Testing

• Add syntax checking for Fish
• Add format checking for Fish
• Add PHP item tests
• Add chruby item tests