ci: run coverage w/o orjson

Author: gadomski

.github/workflows/continuous-integration.yml

@@ -73,10 +73,14 @@ jobs:
           pip install -r requirements-test.txt
           pip install -e ".[validation]"
 
-      - name: Execute test suite
-        run: ./scripts/test
-        env:
-          CHECK_COVERAGE: true
+      - name: Run coverage with orjson
+        run: coverage run -m unittest discover tests
+
+      - name: Uninstall orjson
+        run: pip uninstall -y orjson
+
+      - name: Run coverage without orjson, appending results
+        run: coverage run -a -m unittest discover tests
 
       - name: Prepare ./coverage.xml
         # Ignore the configured fail-under to ensure we upload the coverage report. We