Refactor GitHub Actions workflow for CMake build

Author: djipi

.github/workflows/build.yml

@@ -0,0 +1,28 @@
+name: Build
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+
+    steps:
+      # Checkout code
+      - uses: actions/checkout@v2
+
+      - name: Install build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y ninja-build pkg-config cmake g++ qt5-default qtbase5-dev qttools5-dev-tools
+
+      # --- First build ---
+      - name: Configure CMake
+        run: cmake -B build -G "Ninja"
+
+      - name: Build
+        run: cmake --build build