Fix: imagemin-pngquantのv7.0.0用に指定方法を修正
Fix: imagemin-pngquantのv7.0.0用に指定方法を修正

#199
https://github.com/imagemin/imagemin-pngquant/releases/tag/v7.0.0

manabuyasuda/website-template,manabuyasuda/website-template