Update dependencies

Author: sondrelg

.github/workflows/testing.yml

@@ -19,7 +19,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
             ${{ runner.os }}-
-      - run: python -m pip install pre-commit pylint tomli setuptools pip -U
+      - run: python -m pip install pre-commit pylint
       - run: pre-commit run --all-files
   test:
     # ---------------------------------------------------
@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.6", "3.7", "3.8", "3.9", "3.10.0-beta.1" ]
+        python-version: [ "3.6", "3.7", "3.8", "3.9", "3.10.0-rc.1" ]
         django-version: [ "2.2", "3.0", "3.1", "3.2" ]
     steps:
       - name: Check out repository