Try to get coveralls working again

pyproject.toml

@@ -78,7 +78,7 @@ test-groups = ["dev"]
 test-command = [
     "python -c 'import mwparserfromhell.parser._tokenizer'",
     "pytest {project}/tests -rxs --cov=mwparserfromhell",
-    "if [[ $RUNNER_OS == Linux ]]; then mkdir -p /output && mv .coverage /output/.coverage.$(uuidgen); fi"
+    "python {project}/scripts/save_coverage.py",
 ]
 
 [tool.pyright]

scripts/save_coverage.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+
+import os
+import shutil
+import traceback
+import uuid
+
+try:
+    if os.getenv("RUNNER_OS") == "Linux":
+        os.makedirs("/output", exist_ok=True)
+        shutil.move(".coverage", f"/output/.coverage.{uuid.uuid4().hex}")
+except Exception:
+    traceback.print_exc()