Add more versions to testing matrix (#1040)

* Add more versions to testing matrix

* Update mypy-dev dep

* fix sed

Author: basnijholt

.github/workflows/pytest.yaml

@@ -49,7 +49,15 @@ jobs:
           - python-version: "3.12"
             core-version: "2024.3.3"
           - python-version: "3.12"
-            core-version: "2024.4.1"
+            core-version: "2024.4.4"
+          - python-version: "3.12"
+            core-version: "2024.5.5"
+          - python-version: "3.12"
+            core-version: "2024.6.4"
+          - python-version: "3.12"
+            core-version: "2024.7.4"
+          - python-version: "3.12"
+            core-version: "2024.8.3"
           - python-version: "3.12"
             core-version: "dev"
     steps: