Add support for Python 3.13; drop support for Python 3.8

[chrisrink10]

Fixes #1056

I ran pyupgrade --py39-plus on the entire source tree to convert from typing.{List,Set,...} to the generic forms of the builtins (among other available upgrades).

Upgrading to 3.13 also surfaced #1088 which I filed to address separately since this PR is already quite large.

[ikappaki]

Hi @chrisrink10, apologies for the intrusion, MS-Windows failure below is due to python/cpython#125283 change in os.path.isabs behavior, in case you were wondering:

_________________________________ reader-test _________________________________
ERROR in (reader-test) (test_io.lpy:86)

Traceback (most recent call last):
  File "D:\a\basilisp\basilisp\tests\basilisp\test_io.lpy", line 86, in reader_test
    (is (= "hi there" (slurp (str "file:///" filename))))
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\a\basilisp\basilisp\.tox\py313\Lib\site-packages\basilisp\core.lpy", line 7149, in slurp
    (with-open [reader (apply basilisp.io/reader f opts)]
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\a\basilisp\basilisp\.tox\py313\Lib\site-packages\basilisp\core.lpy", line 207, in apply
    (basilisp.lang.runtime/apply f args)))
                           ^^^^^^^^^^^^^^
  File "D:\a\basilisp\basilisp\.tox\py313\Lib\site-packages\basilisp\lang\runtime.py", line 1311, in apply
    return f(*final)
  File "D:\a\basilisp\basilisp\.tox\py313\Lib\site-packages\basilisp\io.lpy", line 291, in reader
    (defn reader
    ...<28 lines>...
           (make-reader f)))
  File "C:\hostedtoolcache\windows\Python\3.13.0\x64\Lib\functools.py", line 929, in wrapper
    return dispatch(args[0].__class__)(*args, **kw)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "D:\a\basilisp\basilisp\.tox\py313\Lib\site-packages\basilisp\io.lpy", line 210, in __make_reader_str_5880
    (try
    ^^^^
    ...<2 lines>...
        (make-reader (pathlib/Path f) opts))))
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\hostedtoolcache\windows\Python\3.13.0\x64\Lib\functools.py", line 929, in wrapper
    return dispatch(args[0].__class__)(*args, **kw)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "D:\a\basilisp\basilisp\.tox\py313\Lib\site-packages\basilisp\io.lpy", line 249, in __make_reader_ParseResult_5860
    (-> (as-path f)
        (make-reader opts))
  File "C:\hostedtoolcache\windows\Python\3.13.0\x64\Lib\functools.py", line 929, in wrapper
    return dispatch(args[0].__class__)(*args, **kw)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "D:\a\basilisp\basilisp\.tox\py313\Lib\site-packages\basilisp\io.lpy", line 233, in __make_reader_Path_5906
      (apply-kw python/open f opts))
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<55 lines>...
                {:url f :opts opts}))))
                ^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\a\basilisp\basilisp\.tox\py313\Lib\site-packages\basilisp\core.lpy", line 828, in apply_kw
    (basilisp.lang.runtime/apply-kw f args))
                           ^^^^^^^^^^^^^^^^^
  File "D:\a\basilisp\basilisp\.tox\py313\Lib\site-packages\basilisp\lang\runtime.py", line 1336, in apply_kw
    return f(*final, **kwargs)
OSError: [Errno 22] Invalid argument: '\\C:\\Users\\RUNNER~1\\AppData\\Local\\Temp\\tmpc1675mnk'

[ikappaki]

Something along the following fixes the break

diff --git a/src/basilisp/io.lpy b/src/basilisp/io.lpy
index a07e861..9dca382 100644
--- a/src/basilisp/io.lpy
+++ b/src/basilisp/io.lpy
@@ -34,7 +34,7 @@
       (let [path (.-path f)]
         ;; On MS-Windows, extracting an absolute path from the URL
         ;; incorrectly adds a leading `/', .e.g. /C:\xyz.
-        (pathlib/Path #?(:windows (if (os.path/isabs path) (subs path 1) path)
+        (pathlib/Path #?(:windows (if (str/starts-with? path "/") (subs path 1) path)
                          :default path)))
       (throw
        (ex-info "Cannot coerce non-File URL to pathlib.Path"

[chrisrink10]

@ikappaki thanks! I pushed that and will see how it goes.

[chrisrink10]

#1089

[chrisrink10]

TIL IOError is just an alias of OSError.