[cleanup] Sort imports

Using https://github.com/PyCQA/isort

    isort -m VERTICAL_HANGING_INDENT --py 36 -l 80 --rr -n --tc .

devscripts/update-version.py

@@ -1,8 +1,7 @@
 #!/usr/bin/env python3
-from datetime import datetime
-import sys
 import subprocess
-
+import sys
+from datetime import datetime
 
 with open('yt_dlp/version.py') as f:
     exec(compile(f.read(), 'yt_dlp/version.py', 'exec'))