Update development status

Author: LD250

setup.py

@@ -32,7 +32,7 @@
     author="Hetzner Cloud GmbH",
     author_email='support-cloud@hetzner.com',
     classifiers=[
-        'Development Status :: 2 - Pre-Alpha',
+        'Development Status :: 5 - Production/Stable',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: MIT License',
         'Natural Language :: English',