Breaking Changes
make `mut` lowercase-only and add it to `ReservedKeyword`
only parse keywords if they form the whole identifier
don't parse `NaN`, `inf`, and `infinity` as floats
make NaN == NaN inside Expression
tokenize keywords and identifiers correctly (428)
track memory depedencies involving the block terminator
make NaN == NaN inside Expression (318)
track memory dependencies involving the block terminator (433)
Features
add missing `__all__` definitions to `.pyi` files