Add license field to project metadata

Author: C0rn3j

pyproject.toml

@@ -5,6 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "PySDL3"
 description = "A pure Python wrapper for SDL3."
+license = "MIT"
 readme = {file = "README.md", content-type = "text/markdown"}
 authors = [
     {name = "Yusuf Rençber", email = "[email protected]"}
@@ -17,7 +18,6 @@ classifiers = [
     "Operating System :: POSIX :: Linux",
     "Operating System :: MacOS :: MacOS X",
     "Operating System :: Microsoft :: Windows",
-    "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -36,4 +36,4 @@ packages = ["sdl3"]
 "sdl3" = ["py.typed"]
 
 [tool.setuptools.dynamic]
-version = {attr = "sdl3.__version__"}
+version = {attr = "sdl3.__version__"}