* update jest config
* add more tests on docs plugin
* fix(v2): docs plugin should not add routes if there are no docs
* fix
* rm -rf coverage
* nits
* update
* refactor(v2): simplify last updated logic for faster dev
* Update packages/docusaurus-plugin-content-docs/src/__tests__/lastUpdate.test.ts
* Update packages/docusaurus-plugin-content-docs/src/__tests__/lastUpdate.test.ts