Fixed the issue about Feb. 31 or Apr. 31 (issue #166)

[chinalwb]

What does this PR do?

This PR fixed the issue mentioned in #166 , we should never show Feb. 31 or Apr. 31.

How to test manually?

• To reproduce:

  1. Build the app with the code base
  2. Run the sample app, taps on the first option: Click me to open single dialog
  3. Scroll to select Jan. 31
  4. Change the month picker to Feb.
  5. Check the app

• To verify:

  1. Build the app with the branch chinalwb/SingleDateAndTimePicker
  2. Do the same actions try to reproduce the issue
  3. Check the app

Expected Behavior

1. The app should not show Feb. 31, that makes no sense
2. The app should show Feb. 28 or 29 (depends on the leap years)

[chinalwb]

Hi @florent37 , thanks for the great work!

Please take a look about this PR when you have some time, I hope it helps but not introduces new issues.

I am about to work out another PR for including this feature: #161 (comment), please let me know what do you think about it.

Have a nice day guy! And Happy New Year, get a much better 2021!

Thanks!