updates adds install libxcb-cursor-dev; export QT_QPA_PLATFORM=xc…

…b` in ci.yml (#115)

.github/workflows/ci.yml

@@ -86,6 +86,7 @@ jobs:
           sudo apt-get update
           sudo apt-get install xvfb
           sudo apt-get install libegl-dev
+          sudo apt-get install libxcb-cursor-dev
           ## Qt for X11 Requirements> https://doc.qt.io/qt-6/linux-requirements.html
           sudo apt-get install libfontconfig1-dev libfreetype6-dev
           sudo apt-get install libx11-dev libx11-xcb-dev
@@ -99,6 +100,7 @@ jobs:
           export DISPLAY=:1
           sudo Xvfb $DISPLAY -screen 0 1024x768x24 </dev/null &
           export QT_DEBUG_PLUGINS=0
+          export QT_QPA_PLATFORM=xcb
           export LD_LIBRARY_PATH=$pythonLocation"/lib/python${{ matrix.python-version }}/site-packages/PySide6/Qt/plugins/platforms"
           coverage erase
           coverage run -a --source ./sksurgerybard -m pytest -v -s