v0.9.0

• Implement .(, C", PARSE, PARSE-NAME, PAD, ?DO, <>, 0<>, 2>R, 2R>, 2R@
• api: Add error to retrieve error code
• api: Change interpret to no longer return state
• WORDS: Remove accidental spaces after hidden words
• Bump WABT dependency requirement to 1.0.29
• Misc. fixes, cleanups & documentation updates

Full Changelog: v0.8.4...v0.9.0