v3.7.0

This release allows KnpMenu to work with the future release of Twig 4, by removing the deprecated spaceless filter.
This was done in a way which should be probably improved. For all the details about it, please check the discussions on PR #399

What's Changed

• improve wording and format on texts by @garak in #403
• fix spaceless deprecation by @garak in #399

Full Changelog: v3.6.0...v3.7.0