fix(pypi): add classifiers for python 3.10 / 3.11

I missed this bit while adding support for python 3.11 in #89

* chore: keep codecov from reporting early 

Builds look failed until all the tasks are done. Codecov's site says that `require_ci_to_pass` is default yes. 🤷 

Add after_n_builds set to the number of build tasks we have.

codecov.yml

@@ -1,3 +1,7 @@
 coverage:
   status:
-    patch: off
+    patch: off
+  require_ci_to_pass: yes
+  notify:
+    after_n_builds: 6
+    wait_for_ci: yes

setup.py

@@ -54,6 +54,8 @@ def setup_package():
             "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",
         ],
     )