Bumps [html-minifier](https://github.com/kangax/html-minifier) from 3.5.8 to 3.5.15.
- [Release notes](https://github.com/kangax/html-minifier/releases)
- [Commits](https://github.com/kangax/html-minifier/compare/v3.5.8...v3.5.15)
Signed-off-by: dependabot[bot] <support@dependabot.com>