chore: adjust incorrect development status

Author: erikwrede

setup.py

@@ -68,7 +68,7 @@ def run_tests(self):
     author_email="[email protected]",
     license="MIT",
     classifiers=[
-        "Development Status :: 3 - Alpha",
+        "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",
         "Topic :: Software Development :: Libraries",
         "Programming Language :: Python :: 3.8",