Update gulp-imagemin requirement from ^4.1.0 to ^6.0.0
Update gulp-imagemin requirement from ^4.1.0 to ^6.0.0

Updates the requirements on [gulp-imagemin](https://github.com/sindresorhus/gulp-imagemin) to permit the latest version.
- [Release notes](https://github.com/sindresorhus/gulp-imagemin/releases)
- [Commits](https://github.com/sindresorhus/gulp-imagemin/compare/v4.1.0...v6.0.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
nodes777/resumeGame,nodes777/resumeGame