Testing 4.0

Author: jason-fox

.github/workflows/ci.yml

@@ -32,7 +32,7 @@ jobs:
       - name: Run DITA-OT Unit Test
         uses: jason-fox/dita-unit-test-action@master
         with:
-          dita-ot-version: 3.7.4
+          dita-ot-version: '4.0'
           plugin: 'fox.jason.passthrough.doxygen'
         env:
           COVERALLS_TOKEN: ${{ secrets.COVERALLS_TOKEN }}