* 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
