Update gulp-htmlmin requirement from 4.0.0 to 5.0.1
Update gulp-htmlmin requirement from 4.0.0 to 5.0.1

Updates the requirements on [gulp-htmlmin](https://github.com/jonschlinkert/gulp-htmlmin) to permit the latest version.
- [Release notes](https://github.com/jonschlinkert/gulp-htmlmin/releases)
- [Commits](https://github.com/jonschlinkert/gulp-htmlmin/commits/5.0.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
ferrarimarco/personal-website,ferrarimarco/personal-website,ferrarimarco/personal-website,ferrarimarco/personal-website