2.0.7

CHANGES:

• Add _Float16 type support (#190, #193).
• Add C23 alignof and alignas support (#189, #191).
• Add initializer support for anonymous struct in union (#176, #184).
• Fix enumerator printing (#185).
• Remove global state from Pretty (#187).
• Remove OCaml <4.12 support (#180, #181).
• Use gnu11 standard in most tests (#188, #192).