Temporary test directories not removed

[dennisvang]

PyUpdater/tests/conftest.py

Lines 45 to 47 in 282760d

	def cleandir():
	new_path = tempfile.mkdtemp()
	os.chdir(new_path)

From tempfile docs:

The user of mkdtemp() is responsible for deleting the temporary directory and its contents when done with it.

On Windows 10, running the tests leaves AppData\Local\Temp full of empty "tmp*" directories.