Describe the bug
dayjs does not have function types in Typescript.

Expected behavior
With localeData plugin included, dayjs should have the declaration of functions below.

dayjs.weekdays()
dayjs.weekdaysShort()
dayjs.weekdaysMin()
dayjs.monthsShort()
dayjs.months()

Information

• Day.js Version 1.8.33
• OS: Mac
• Browser Chrome 85
• Time zone: GMT+11:00

Description of the Issue and Steps to Reproduce:

Did you search for duplicate issue? Yes

Please describe the issue and steps to reproduce, preferably with a code sample / plunker:

Would you like to add ng-add schematics into this repo?

*Ensure your issue is isolated to ngx-moment. Issues involving third party tools will be closed unless submitted by the tool's author/main

I was looking for the format YYYY/MM/DD in the formats object but I didn't find any, isn't this a common format?
in Hijri it would be iYYYY/iMM/iDD

Hi!

Getting the number of days in the month doesn't work.

Method iDaysInMonth() returns value 'NaN'.

Workaround:
Method endOf('iMonth').iDate() return value correctly.