* feat: Col support `flex` prop
* update snapshot
* update doc
* row component use flex type by default
* revert grid flex layout doc
* remove float style
* remove doc old FAQ
* revert .make-row
* col style use flex and max-width
* remove useless Col style and imorove base doc for a single Col
* update snapshots
* fix flex mode pseudo
* update snapshots
* back to old flex mode demo gray background color
* set default col flex => 1 auto
* change grid about flex mode description
* update snapshots
* improve grid introduce and fix with gutter bug
* update snapshots
* remove version
* added new calendar api, renderHeader now we can customize calendar header
* fixed typo for tests
* error handling for renderHeader
* covering all cases with tests
* fixed tests and change console error to warning
* fixed feedbacks and code optimization
* cleanup callback function arguments
* removed unused changes
* fixed tests
* added extra classes
* fixed some comments
* tying to fix test for remote
* tying to fix test for remote in my local machin it works fine
* tying to fix test for remote in my local machin it works fine
* tying to fix test for remote in my local machin it works fine
* updated test snapshots
* fixed comment
* fixed linting
* fixed some texts
* added header for CN and added argument types
* removed extra row
