make bluepyopt tox4 compatible

Author: Jaquier Aurélien Tristan

tox.ini

@@ -1,5 +1,6 @@
 [tox]
 envlist = py{3}-unit-functional-style
+minversion = 4
 
 [gh-actions]
 python =
@@ -10,6 +11,7 @@ python =
     3.10: py3
     3.11: py3
     3.12: py3
+
 [testenv]
 envdir =
     py27{-unit,-functional,-style,-syntax}: {toxworkdir}/py27
@@ -24,7 +26,7 @@ deps =
     sh
     pytest-cov
 download = true
-whitelist_externals =
+allowlist_externals =
     make
     find
     cd
@@ -54,4 +56,4 @@ deps =
     sphinx
     sphinx-bluebrain-theme
 commands = make html SPHINXOPTS=-W
-whitelist_externals = make
+allowlist_externals = make