v0.6.4

What's Changed

• Color changes due to features flag by @GreasySlug in #365
• Fix #370 by @mtshiba in #371
• update: improve visibility on pretty by @GreasySlug in #373
• Implements user-defined variable-length parameter by @mtshiba in #376
• Feature: user-defined variable-length param by @mtshiba in #377
• Update japanese readme by @toddlerer in #378
• feat: add integration eval tests base by @toddlerer in #372
• docs: Add sync_to_translation_status.er by @toddlerer in #367
• Parallelize the tests by @mtshiba in #383
• Add git commit message template by @GreasySlug in #385
• Add warnings for unused vars by @mtshiba in #389
• test: optimize eval tests by @C-BJ in #387
• feat(REPL): improve interactive experience by @C-BJ in #362
• Add FileCache by @mtshiba in #391

Full Changelog: v0.6.3...v0.6.4