Fix package version resolution issues

Author: ArtyomVancyan

.github/workflows/tests.yml

@@ -15,10 +15,10 @@ jobs:
           - python: "3.6"
             env: py36-django11
             os: ubuntu-20.04  # 3.6 is not available on ubuntu-20.04
+          - python: "3.7"
+            env: py37-django11
           - python: "3.8"
             env: py38-django11
-          - python: "3.9"
-            env: py39-django11
 
           - python: "3.6"
             env: py36-django21
@@ -43,15 +43,11 @@ jobs:
           - python: "3.10"
             env: py310-django40
 
-          - python: "3.9"
-            env: py39-django41
           - python: "3.10"
             env: py310-django41
           - python: "3.11"
             env: py311-django41
 
-          - python: "3.9"
-            env: py39-django42
           - python: "3.10"
             env: py310-django42
           - python: "3.11"

tox.ini

@@ -1,21 +1,19 @@
 [tox]
 envlist =
-    py{36,38,39}-django11
+    py{36,37,38}-django11
     py{36,38,39}-django21
     py{36,38,310}-django32
     py{38,39,310}-django40
-    py{39,310,311}-django{41,42}
-    py{310,311}-djangomain
+    py{310,311}-django{41,42}
 
 [testenv]
 deps =
-    djangomain: https://github.com/django/django/tarball/main
     django42: django<4.3
     django41: django<4.2
     django40: django<4.1
     django32: django<3.3
     django21: django<2.2
-    django11: django<2.0
+    django11: django~=1.0
     -r{toxinidir}/tests/requirements.txt
 allowlist_externals = sh
 commands =