Support for Python 3.14.

[Darshan808]

Some downstream project tests are failing on Python 3.14 (Windows) due to deprecated code here.

jupyter_server/jupyter_server/serverapp.py

Lines 2743 to 2746 in 987ebdd

	try:
	from asyncio import WindowsProactorEventLoopPolicy, WindowsSelectorEventLoopPolicy
	except ImportError:
	pass