🔧 udpate flake8 configuration according to defaults

https://black.readthedocs.io/en/stable/guides/using_black_with_other_tools.html#flake8

setup.cfg

@@ -36,7 +36,7 @@ console_scripts =
     move-dl=move.__main__:main
 
 [flake8]
-max-line-length = 120
+max-line-length = 88
 aggressive = 2
 extend-select = B950
 extend-ignore = E203,E501,E701