Core: purge py3.8 and py3.9 (#3973)

Co-authored-by: Remy Jette <remy@remyjette.com>
Co-authored-by: Jouramie <16137441+Jouramie@users.noreply.github.com>
Co-authored-by: Aaron Wagener <mmmcheese158@gmail.com>

docs/contributing.md

@@ -16,7 +16,7 @@ game contributions:
 * **Do not introduce unit test failures/regressions.**
   Archipelago supports multiple versions of Python. You may need to download older Python versions to fully test
   your changes. Currently, the oldest supported version
-  is [Python 3.8](https://www.python.org/downloads/release/python-380/).
+  is [Python 3.10](https://www.python.org/downloads/release/python-31015/).
   It is recommended that automated github actions are turned on in your fork to have github run unit tests after
   pushing.
   You can turn them on here:  

docs/running from source.md

@@ -7,7 +7,7 @@ use that version. These steps are for developers or platforms without compiled r
 ## General
 
 What you'll need:
- * [Python 3.8.7 or newer](https://www.python.org/downloads/), not the Windows Store version
+ * [Python 3.10.15 or newer](https://www.python.org/downloads/), not the Windows Store version
    * Python 3.12.x is currently the newest supported version
  * pip: included in downloads from python.org, separate in many Linux distributions
  * Matching C compiler