chore(ci): Unparallelize to speed up coverage collection more than tests slow down

Author: effigies

.github/workflows/deno_tests.yml

@@ -1,5 +1,5 @@
 ---
-name: Deno build
+name: Deno tests
 
 on:
   push:
@@ -83,7 +83,7 @@ jobs:
             touch tests/data/bids-examples/${DS}/.SKIP_VALIDATION
           done
         if: github.ref_name != 'dev' && github.base_ref != 'dev'
-      - run: deno test --parallel --node-modules-dir=auto $PERMS --coverage=cov/ src/
+      - run: deno test --node-modules-dir=auto $PERMS --coverage=cov/ src/
       - name: Collect coverage
         run: deno coverage cov/ --lcov --output=coverage.lcov
         if: ${{ always() }}