composer(deps): bump tijsverkoyen/css-to-inline-styles

Bumps [tijsverkoyen/css-to-inline-styles](https://github.com/tijsverkoyen/CssToInlineStyles) from 2.2.7 to 2.3.0.
- [Release notes](https://github.com/tijsverkoyen/CssToInlineStyles/releases)
- [Changelog](https://github.com/tijsverkoyen/CssToInlineStyles/blob/master/CHANGELOG.md)
- [Commits](tijsverkoyen/CssToInlineStyles@v2.2.7...v2.3.0)

---
updated-dependencies:
- dependency-name: tijsverkoyen/css-to-inline-styles
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>