v0.5.0

This is hopefully the last backwards-compatibility-breaking release for a while. Several types were made private in this release, so any future change to those types will be backwards compatible.

What's Changed

• test: Use static_assertions to check for type sizes by @tmke8 in #804
• fix: Fix operator categories in symbol.rs to match MathML Core spec by @tmke8 in #806
• feat: Produce nice errors with ariadne by @tmke8 in #807
• docs: Add test page for browser bugs by @tmke8 in #808
• feat(python): Make LatexError an exception again by @tmke8 in #809
• Make LatexErrKind private by @tmke8 in #813
• Clean up error.rs by @tmke8 in #814

Full Changelog: v0.4.0...v0.5.0