Update pyproject.toml

Update development status

Author: rayosborn

pyproject.toml

@@ -10,7 +10,7 @@ readme = "README.md"
 license = {file = "COPYING"}
 authors = [{name = "Raymond Osborn", email = "rayosborn@mac.com"}]
 classifiers = [
-  "Development Status :: 4 - Beta",
+  "Development Status :: 5 - Production/Stable",
   "License :: OSI Approved :: BSD License",
   "Intended Audience :: Developers",
   "Intended Audience :: Science/Research",