CI: try different way to install xquartz

tacaswell · tacaswell · commit 6488d90ae769 · 2019-10-16T17:25:37.000-04:00
diff --git a/ci/azure-pipelines-steps.yml b/ci/azure-pipelines-steps.yml
@@ -28,7 +28,8 @@ steps:
 
 - ${{ if eq(parameters.installer, 'brew') }}:
   - script: |
-      brew install pkg-config ffmpeg imagemagick mplayer ccache xquartz
+      brew cask install xquartz
+      brew install pkg-config ffmpeg imagemagick mplayer ccache
     displayName: 'Install dependencies with brew'
 
 - ${{ if eq(parameters.installer, 'apt') }}:
