Unify CI check

Having to update the required statuses in the branch protection rules
every time the test matrix is updated is a pain in the ass.

Author: masklinn

.github/workflows/ci.yml

@@ -140,3 +140,5 @@ jobs:
       run: python -m pip install ${{ matrix.artifact || '.' }}
     - name: run tests
       run: python ${{ matrix.opts }} -m pytest -v -Werror -Wignore::ImportWarning --doctest-glob="*.rst" -ra
+  ci:
+    needs: ["checks", "test"]