release: 4.2.0

[curbengh]

What does it do?

How to test

git clone -b 4.2.0 https://github.com/curbengh/hexo.git
cd hexo
npm install
npm test

Pull request tasks

- [ ] Add test cases for the changes.

• Passed the CI test.

[coveralls]

Coverage remained the same at 97.092% when pulling b330adb on curbengh:4.2.0 into 3d80619 on hexojs:master.

[SukkaW]

What are included in Hexo 4.2.0:

• fix(theme): deep merge configs #3967 fixes Theme config is not deeply updated #3964
• feat(cache): option for cache rendered content #3963 optional hexo-server cache
• refactor(theme/view): drop lodash.assignIn #3969 & refactor(theme/view): simplify assignIn #3987 closes Replace lodash with native API #3753 (Locals.prototype._ will be removed at Hexo 5.0.0)
• refactor(fragment_cache): reuse result #3985 fixed a potential fragment performance issue which is introduced in Hexo 4.1.1
• fix(open_graph-helper): pass all pretty_urls options #3983 enables pretty_url for open_graph()
• refactor(toc_helper): utilize hexo-util #3850 drops cheerio which closes Replace cheerio with native API #3677
  • A special notice should be mentioned in release note: Replace cheerio with native API #3677 (comment)
• feat(toc_helper): add min_depth option #3997 add min_depth support for toc() helper
• feat(cache): plain object cache hexo-util#162 enables cache for many utilities.

[SukkaW]

The docs for config.server.cache is finished in hexojs/hexo-server#107
The docs for min_depth option of toc() is finished in hexojs/site#1260

[curbengh]

https://github.com/hexojs/hexo/releases/tag/4.2.0
https://www.npmjs.com/package/hexo/v/4.2.0