6.3.0
refactor(box): remove Bluebird.asCallback (#4379)
chore(deps): bump js-yaml from 3.14.1 to 4.0.0 (#4607)
fix(tag): show source file in unformatted error message (#5031)
Exclude some languages in code highlghting. (#3865)
refactor(test-generators-page): arrow function (#3956)
fix(#5053): exclude data-uri image for og:image (#5053)
fix(#4780): empty tag name correction (#4786)
chore: use example.com for example domain (#4512)
Merge pull request #4781 from kristofzerbe/master
refactor(nunjucks): dedicated nunjucks renderer (#4356)
feat(tag/code): add `language_attr` option (hexojs/hexo-util#278) (#5017)
revert(#4401): "test: replace sinon#assert" (#4404)