Should `QuicConfiguration.load_cert_chain` allow str and not just PathLike?

[gsnedders]

Currently:

aioquic/src/aioquic/quic/configuration.py

Lines 123 to 128 in 7f27a0b

	def load_cert_chain(
	self,
	certfile: PathLike,
	keyfile: Optional[PathLike] = None,
	password: Optional[Union[bytes, str]] = None,
	) -> None:

Given this is just passed into open, I'd have expected the type signature to allow something like open's argument:

FileDescriptorOrPath: TypeAlias = int | StrOrBytesPath

Or, potentially more likely, just StrOrBytesPath:

StrOrBytesPath: TypeAlias = str | bytes | PathLike[str] | PathLike[bytes]  # stable

[jlaine]

Yeah it looks like you are right. What's a bit annoying is that mypy did not pick this up.. because our tests do not have type annotations. I'm working on a PR.