Set version to v2.0.9, update classifiers (#64)

Author: adrianeboyd

setup.cfg

@@ -1,5 +1,5 @@
 [metadata]
-version = 2.0.8
+version = 2.0.9
 description = Super lightweight function registries for your library
 url = https://github.com/explosion/catalogue
 author = Explosion
@@ -22,6 +22,7 @@ classifiers =
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
     Topic :: Scientific/Engineering
 
 [options]