update github action

Author: Remi-Gau

.github/workflows/moxunit.yml

@@ -11,17 +11,26 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+
     - uses: actions/checkout@v2
       with:
         submodules: true
         fetch-depth: 1
+
+    - name: Make jsonread for octave
+      run: |
+        cd lib/JSONio
+        mkoctfile --mex jsonread.c jsmn.c -DJSMN_PARENT_LINKS
+      # cd ../..
+
     - name: MOxUnit Action
       uses: joergbrech/[email protected]
       with:
         tests: tests
         src: src
         with_coverage: true
         cover_xml_file: coverage.xml
+        
     - name: Code coverage
       uses: codecov/codecov-action@v1
       with: