sindresorhus/gulp-imagemin — pull request #87 by Jakobud (2014-12-29 20:50:08+00:00)
Title: Added verbose as a passable boolean option.

Verbose output is already supported via gulp's --verbose flag. This simply allows you to specify `verbose: true` in the `imagemin` options instead of using `--verbose`.

The `--verbose` flag will be used if the `verbose` flag is missing or is not a boolean, thus preserving backwards compatibility.