Announcing mlua v0.10

This is a major release with focus on improving developer experience and multi threading support.

Most notable changes:

• Dropped 'lua lifetime (Lua and subtypes are now 'static)
• Send + Sync with send feature flag
• Function traits to wrap Rust functions with arbitrary number of arguments
• Low level Lua C API support through Lua::exec_raw

See full CHANGELOG

The new version is even faster than v0.9, see our benchmarks.