CI: try using only plotly backend

.github/workflows/test-package.yml

@@ -26,8 +26,11 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install Linux libraries
       run: |
-          sudo apt-get update -y -qq
-          sudo apt install -y libegl1-mesa libgl1-mesa-dri libxcb-xfixes0-dev mesa-vulkan-drivers
+        sudo apt-get update -y -qq
+        sudo apt-get install -y libdbus-1-3 libxkbcommon-x11-0 libxcb-icccm4 \
+          libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 \
+          libxcb-xinerama0 libxcb-xinput0 libxcb-xfixes0 graphviz graphviz-dev \
+          mesa-vulkan-drivers
     - name: Install dependencies
       run: |
         pip install --upgrade pip
@@ -37,19 +40,14 @@ jobs:
         pip install git+https://github.com/siavashk/pycpd@master
         pip install pyarrow
     - name: Install navis
-      run: pip install -e .[dev,all]
+      run: pip install -e .[dev,plotly]
     # - run: pip install python-igraph
     #   if: ${{ matrix.igraph == 'igraph' }}
     - name: Report dependency versions
       run: pip freeze -r requirements.txt
     - name: Test
-      run: |
-        export NAVIS_HEADLESS=TRUE
-        pytest --verbose
-
-    # - name: Test
-    #   uses: coactions/setup-xvfb@v1
-    #   with:
-    #     run: |
-    #       export NAVIS_HEADLESS=TRUE
-    #       pytest --verbose
+      uses: coactions/setup-xvfb@v1
+      with:
+        run: |
+          export NAVIS_HEADLESS=TRUE
+          pytest --verbose