Update PyPI classifiers

Author: Kenny2github

pyproject.toml

@@ -11,7 +11,7 @@ keywords = ["multivector", "geometric", "algebra"]
 license = {file = "LICENSE"}
 authors = [{name = "Ken Hilton"}]
 classifiers = [
-    "Development Status :: 3 - Alpha",
+    "Development Status :: 4 - Beta",
     "License :: OSI Approved :: Apache Software License",
     "Intended Audience :: Developers",
     "Intended Audience :: Science/Research",
@@ -20,6 +20,10 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
     "Typing :: Typed"
 ]
 dependencies = []