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>

tests/core/test_config.py

@@ -531,7 +531,7 @@ async def test_config_value_atomicity(config):
                 await asyncio.sleep(0.1)
                 await config.foo.set(foo)
 
-        tasks.append(func())
+        tasks.append(asyncio.create_task(func()))
 
     await asyncio.wait(tasks, return_when=asyncio.ALL_COMPLETED)
 
@@ -549,7 +549,7 @@ async def test_config_ctxmgr_atomicity(config):
                 foo.append(0)
                 await asyncio.sleep(0.1)
 
-        tasks.append(func())
+        tasks.append(asyncio.create_task(func()))
 
     await asyncio.wait(tasks, return_when=asyncio.ALL_COMPLETED)
 

tests/core/test_version.py

@@ -1,5 +1,9 @@
 import importlib.metadata
 import pkg_resources
+import os
+import sys
+
+import pytest
 
 from redbot import core
 from redbot.core import VersionInfo
@@ -39,7 +43,24 @@ def test_version_info_gt():
     assert VersionInfo.from_str(version_tests[1]) > VersionInfo.from_str(version_tests[0])
 
 
-def test_python_version_has_upper_and_lower_bound():
+def test_python_version_has_lower_bound():
+    """
+    Due to constant issues in support with Red being installed on a Python version that was not
+    supported by any Red version, it is important that we have both an upper and lower bound set.
+    """
+    requires_python = importlib.metadata.metadata("Red-DiscordBot")["Requires-Python"]
+    assert requires_python is not None
+
+    # `pkg_resources` needs a regular requirement string, so "x" serves as requirement's name here
+    req = pkg_resources.Requirement.parse(f"x{requires_python}")
+    assert any(op in (">", ">=") for op, version in req.specs)
+
+
+@pytest.mark.skipif(
+    os.getenv("TOX_RED", False) and sys.version_info >= (3, 10),
+    reason="Testing on yet to be supported Python version.",
+)
+def test_python_version_has_upper_bound():
     """
     Due to constant issues in support with Red being installed on a Python version that was not
     supported by any Red version, it is important that we have both an upper and lower bound set.
@@ -50,4 +71,3 @@ def test_python_version_has_upper_and_lower_bound():
     # `pkg_resources` needs a regular requirement string, so "x" serves as requirement's name here
     req = pkg_resources.Requirement.parse(f"x{requires_python}")
     assert any(op in ("<", "<=") for op, version in req.specs)
-    assert any(op in (">", ">=") for op, version in req.specs)