add Django 4.0, Python 3.10, drop Django 1.11 in tox.ini and GitHub actions

.github/workflows/run-tests.yaml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ 3.6, 3.7, 3.8, 3.9 ]
+        python-version: [ 3.6, 3.7, 3.8, 3.9, '3.10' ]
 
     steps:
       - uses: actions/checkout@v1

tox.ini

@@ -2,7 +2,9 @@
 envlist =
     begin
     py36-lint
-    py{36,37,38,39}-django{111,2,21,22,3,31}
+    py{36,37,38,39}-django{2}
+    py{36,37,38,39,310}-django{21,22,3,31,32}
+    py{38,39,310}-django{40}
     coverage-report
 
 [gh-actions]
@@ -11,6 +13,7 @@ python =
     3.7: py37
     3.8: py38
     3.9: py39
+    3.10: py310
 
 [testenv]
 passenv = GITHUB_*
@@ -21,7 +24,8 @@ deps=
     django22: Django>=2.2,<2.3
     django3: Django>=3.0,<3.1
     django31: Django>=3.1,<3.2
-    django111: Django>=1.11,<1.12
+    django32: Django>=3.2,<40
+    django40: Django>=4.0,<4.1
     coverage[toml]
     pillow
     ipdb