Removed Python 3.10 testing until compatibility established.

.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, "3.10" ]
+        python-version: [ 3.6, 3.7, 3.8, 3.9 ]
 
     steps:
       - uses: actions/checkout@v1

README.md

@@ -8,6 +8,8 @@ As a news site, our stories, photos, and other content get divided into "section
 
 ## Features of the project
 
+Currently incompatible with Python 3.10.
+
 **Multiple trees, or a single tree.**
 You can treat all the records as a single tree, shared by all the applications. You can also treat each of the top level records as individual trees, for different apps or uses.
 

tox.ini

@@ -2,7 +2,7 @@
 envlist =
     begin
     py36-lint
-    py{36,37,38,39,310}-django{111,2,21,22,3,31}
+    py{36,37,38,39}-django{111,2,21,22,3,31}
     coverage-report
 
 [gh-actions]
@@ -11,7 +11,6 @@ python =
     3.7: py37
     3.8: py38
     3.9: py39
-    3.10: py310
 
 [testenv]
 deps=