Update dev status trove classifier

Author: thibaudcolas

pyproject.toml

@@ -11,7 +11,7 @@ readme = "README.md"
 repository = "https://github.com/torchbox/django-pattern-library"
 documentation = "https://torchbox.github.io/django-pattern-library/"
 classifiers = [
-    "Development Status :: 4 - Beta",
+    "Development Status :: 5 - Production/Stable",
     "Environment :: Web Environment",
     "Intended Audience :: Developers",
     "License :: OSI Approved :: BSD License",