0.2.0rc1

What's Changed

• Replace Python-based EarleyParser with lexeme-based rust implementation by @hudson-ai & @mmoskal in #951

This pre-release version of guidance uses a new Rust-based Earley lexer + parser that offers significant speedups and bugfixes to guidance grammar parsing. See PR #951 for full details of the optimizations. Expect some changes from current Guidance (v0.1.16) behavior during pre-release.

Full Changelog: 0.1.16...0.2.0rc1