chore: Update dev status classifier

Author: dbanty

pyproject.toml

@@ -7,7 +7,7 @@ license = "MIT"
 keywords=["OpenAPI", "Client", "Generator"]
 authors = ["Dylan Anthony <[email protected]>"]
 classifiers = [
-    "Development Status :: 3 - Alpha",
+    "Development Status :: 4 - Beta",
     "Intended Audience :: Developers",
     "Topic :: Software Development :: Code Generators",
     "Typing :: Typed",