Workaround for fixing pipeline errors

This fixes issue 523, this workaround should be removed after
updating to python 9.

Signed-off-by: Alfredos-Panagiotis Damkalis <fredy@fredy.gr>

tox.ini

@@ -9,6 +9,7 @@ pylint = 2.8.2
 pylint_django = 2.4.4
 sphinx_rtd_theme = 0.5.1
 twine = 3.3.0
+setuptools = 61.1.1
 
 [testenv:flake8]
 deps =
@@ -18,6 +19,7 @@ commands = flake8
 
 [testenv:isort]
 deps =
+    setuptools=={[depversions]setuptools}
     isort=={[depversions]isort}
 extras = dev
 commands = isort -c --df .
@@ -42,6 +44,7 @@ commands = yapf -i -r .
 
 [testenv:pylint]
 deps =
+    setuptools=={[depversions]setuptools}
     pylint=={[depversions]pylint}
     pylint-django=={[depversions]pylint_django}
 extras = dev
@@ -64,6 +67,7 @@ commands =
 
 [testenv:docs]
 deps =
+    setuptools=={[depversions]setuptools}
     sphinx_rtd_theme=={[depversions]sphinx_rtd_theme}
 changedir = {toxinidir}/docs
 commands =
@@ -73,13 +77,17 @@ commands =
 install_command = python -m pip install --no-deps {opts} {packages}
 recreate = True
 deps =
-    -rrequirements-dev.txt
+    setuptools=={[depversions]setuptools}
 extras = dev
-commands = pip check
+commands =
+    pip install --no-deps -rrequirements-dev.txt
+    pip check
 
 [testenv:pytest]
 install_command = python -m pip install --no-deps {opts} {packages}
 deps =
-    -rrequirements-dev.txt
+    setuptools=={[depversions]setuptools}
 extras = dev
-commands = pytest
+commands =
+    pip install --no-deps -rrequirements-dev.txt
+    pytest