[WIP] Monkeypatch tests (#448)

* Parameterize test_internals.py

* Create test_spotify_tools.py

* Monkeypatch pafy.download

* Monkeypatch YouTube search page

* Replace globals with fixtures

* Add missing urllib import, re-ordering and rename test_with_metadata.py

* Avoid creating temp directory in current working directory during test

* Update CHANGES.md

spotdl/internals.py

@@ -1,6 +1,6 @@
+from logzero import logger as log
 import os
 import sys
-from logzero import logger as log
 
 from spotdl import const