Add new environments with lower Django versions

Signed-off-by: Artyom Vancyan <artyom.vancyan2000@gmail.com>

Author: ArtyomVancyan

.github/workflows/tests.yml

@@ -12,6 +12,22 @@ jobs:
     strategy:
       matrix:
         include:
+          - python: "3.6"
+            env: py36-django11
+            os: ubuntu-20.04  # 3.6 is not available on ubuntu-20.04
+          - python: "3.8"
+            env: py38-django11
+          - python: "3.9"
+            env: py39-django11
+
+          - python: "3.6"
+            env: py36-django21
+            os: ubuntu-20.04  # 3.6 is not available on ubuntu-20.04
+          - python: "3.8"
+            env: py38-django21
+          - python: "3.9"
+            env: py39-django21
+
           - python: "3.6"
             env: py36-django32
             os: ubuntu-20.04  # 3.6 is not available on ubuntu-20.04

tox.ini

@@ -1,5 +1,7 @@
 [tox]
 envlist =
+    py{36,38,39}-django11
+    py{36,38,39}-django21
     py{36,38,310}-django32
     py{38,39,310}-django40
     py{39,310,311}-django{41,main}
@@ -11,6 +13,8 @@ deps =
     django41: django<4.2
     django40: django<4.1
     django32: django<3.3
+    django21: django<2.2
+    django11: django<2.0
     -r{toxinidir}/tests/requirements.txt
 commands =
     pip install -e .