ci(test): do not use coverage and run only jats tests

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ env:
 
 jobs:
   linux:
-    runs-on: ubuntu-latest-m
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
         uses: actions/checkout@v4
@@ -25,11 +25,11 @@ jobs:
       #   - Fifteen (!) minute test timeout
       #   - Force exit to prevent hanging
       - name: Run tests
-        run: npx jest --coverage --runInBand --testTimeout=900000 --forceExit
+        run: npx jest jats --runInBand --testTimeout=900000 --forceExit
         env:
           # Tell Node.js how much un-garbage-collected-memory it can
           # allow for to prevent it running out (in Mb)
-          NODE_OPTIONS: --max_old_space_size=24000
+          NODE_OPTIONS: --max_old_space_size=14000
 
       - name: Release package
         if: github.ref == 'refs/heads/master'