tox: fix dependencies

Since flake8 6.0, the copyright plugin fails to run:

  ValueError: 'int' is not callable

This plugin is not critical, remove it.

Also use latest versions of black and pylint along the way.

Link: savoirfairelinux/flake8-copyright#19
Signed-off-by: Robin Jarry <[email protected]>

Author: rjarry

tox.ini

@@ -71,11 +71,10 @@ description = Run coding style checks.
 install_command = {toxinidir}/tox-install.sh {toxworkdir} {opts} {packages}
 changedir = .
 deps =
-	black==22.3.0
+	black
 	flake8
-	flake8-copyright
 	isort
-	pylint==2.14.*
+	pylint
 whitelist_externals =
 	/bin/sh
 	/usr/bin/sh