community/py3-flask: upgrade to 2.0.1

Patchset from Drew DeVault sir@cmpwn.com via aports #3525:

added aports:upgrade label

assigned to @ddevault

added 18 commits

• 983ca276...5fca87b4 - 17 commits from branch master
• e97b9ae2 - community/py3-flask: upgrade to 2.0.1

Compare with previous version

merged