Install missing dependencies in CI, mk. 3

Author: TheAssassin

.github/workflows/main.yml

@@ -25,7 +25,7 @@ jobs:
         if: matrix.ARCH == 'x86_64'
         run: |
           sudo apt-get update
-          sudo apt-get install -y gcovr libmagic-dev libjpeg-dev libpng-dev libboost-filesystem-dev libboost-regex-dev cimg-dev qtbase5-dev nlohmann-json3-dev
+          sudo apt-get install -y gcovr libmagic-dev libjpeg-dev libpng-dev libboost-filesystem-dev libboost-regex-dev cimg-dev qt5-default qtbase5-dev nlohmann-json3-dev
 
       - name: Install dependencies (i386)
         if: matrix.ARCH == 'i386'