Variants-CIT

Same as the previous release for this branch, but with the correct version number this time. The incorrectly versioned release has been taken down.

• Fixed a compat issue with Iris Shaders, causing sanitize_auto to yield different results from usual.
• Fixed hyphens '-' being incorrectly removed from identifiers by most flavours of sanitizations.
• Added sanitize_legacy as an alias of sanitize for parity with v5.