TST: Period with Timestamp overflow
- [x] closes #13346
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`

The first part of the test checks that the period inside boundaries does not raise exception when calling `start_time` and `end_time` methods. The second part checks that methods raise exceptions when outside of boundaries.
The parameters are `Timestamp.min` and `Timestamp.max`, so the tests will follow any change of the boundaries.

Hi @OlivierLuG - is this still active? If so, can you address Matt's comments? I was sure to made answers... I've made a new PR taking into account @mroeschke review. can u merge master and will look  @OlivierLuG is this still active? > @OlivierLuG is this still active?

I'm still here. I'll take a look to this PR on sunday. can you merge master, i think a lot has changed since this was last rebase (but it still should pass); ping on green. OK, done and ping on green Thanks @OlivierLuG 