Upgrade for Debian Buster

tox.ini

@@ -1,38 +1,30 @@
 [tox]
-envlist = py35,py36,py37,py38,linters
+envlist = py37,py38,linters
 skipsdist = True
 
 [testenv]
-basepython = python3
+sitepackages = True
 deps =
     -r{toxinidir}/requirements.txt
     coverage
 commands =
-    ./manage.py makemigrations
-    coverage run ./manage.py test {posargs}
+    coverage run --omit='*migrations*' ./manage.py test {posargs}
     coverage report -m
 
-[testenv:pre-commit]
-deps = pre-commit
-commands =
-    pre-commit run --all-files --show-diff-on-failure
-
 [testenv:linters]
 deps =
-    -r{toxinidir}/requirements.txt
     flake8
     flake8-colors
+    flake8-django
     flake8-import-order
     flake8-typing-imports
     pep8-naming
     pyflakes
-    pylint
 commands =
     flake8 logs media users
-    pylint .
 
 [flake8]
-ignore = D203, W503, E203, I100, I201, I202, C901
+ignore = W503, I100, I101
 exclude =
     .tox,
     .git,
@@ -44,7 +36,7 @@ exclude =
     .cache,
     .eggs,
     *migrations*
-max-complexity = 10
+max-complexity = 15
 import-order-style = google
 application-import-names = flake8
 format = ${cyan}%(path)s${reset}:${yellow_bold}%(row)d${reset}:${green_bold}%(col)d${reset}: ${red_bold}%(code)s${reset} %(text)s