Add Windows and Mac runners

Author: Vahila

.github/workflows/main.yml

@@ -3,7 +3,7 @@ on: push
 jobs:
   my-job:
     name: Run System tests
-    runs-on: ubuntu-latest
+    runs-on: [ubuntu-latest, windows-latest, macos-latest]
     steps:
       - name: Check out repository
         uses: actions/checkout@v2
@@ -16,4 +16,4 @@ jobs:
         run: mvn test-compile failsafe:integration-test
         env:
           MATLAB_ROOT: ${{ steps.setup-matlab.outputs.matlabroot }}
-          MLM_LICENSE_TOKEN:  ${{ secrets.MLM_LICENSE_TOKEN}}
+          MLM_LICENSE_TOKEN:  ${{ secrets.MLM_LICENSE_TOKEN}}