Updated version from 0.2.1a0 to 0.2.1a1

Author: Aermoss

setup.py

@@ -6,7 +6,7 @@
 setup(
     name = "PySDL3",
     packages = ["sdl3"],
-    version = "0.2.1a0",
+    version = "0.2.1a1",
     description = description.split("\n")[1],
     long_description = description,
     long_description_content_type = "text/markdown",