Support 3.14

[thatch]

• 3.13
  • _testcapi_datetime added, defined in Modules/_testcapi/datetime.c
• 3.14
  • Addition of annotationlib whose name is backed up by a pep.

I notice the copyright year in the generated file is out of date, do you have objections to strftime("%Y") in the generator?

[thatch]

RTD check is failing because this pr is from a fork.

[amyreese]

I notice the copyright year in the generated file is out of date, do you have objections to strftime("%Y") in the generator?

Better yet just get rid of the year in the copyright statement altogether.