Update deps, allow Python 3.9, drop Fedora 32 (#5121)

* Update deps + allow Python 3.9

* Add in updates from Jack's branch

* Fix multiple target for cross-reference warnings

* Update a few more Python 3.8 occurrences

* Bump further

* Don't install tox in CodeQL environment

* Bump Python version in docs to 3.9.7

* more bumps

* Add missing pin

* Stop using the deprecated distro.linux_distribution()

* Suppress deprecation warning

* Fix OpenSUSE Leap instructions

* Drop Fedora 32

* Add Python 3.10-dev to CI

* meh

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

.github/workflows/tests.yml

@@ -17,12 +17,18 @@ jobs:
           python_version:
             - "3.8"
           tox_env:
-            - py
             - style
             - docs
           include:
-            - tox_env: py
-              friendly_name: Tests
+            - tox_env: py38
+              python_version: "3.8"
+              friendly_name: Python 3.8 - Tests
+            - tox_env: py39
+              python_version: "3.9"
+              friendly_name: Python 3.9 - Tests
+            - tox_env: py310
+              python_version: "3.10-dev"
+              friendly_name: Python 3.10-dev - Tests
             - tox_env: style
               friendly_name: Style
             - tox_env: docs
@@ -52,6 +58,8 @@ jobs:
         matrix:
           python_version:
             - "3.8"
+            - "3.9"
+            - "3.10-dev"
         fail-fast: false
       name: Tox - Postgres
       services: