Added Mac Qt6 build

.github/workflows/osx.yml

@@ -6,8 +6,8 @@ on:
       - master
 
 jobs:
-  build:
-    name: GPXSee
+  qt5:
+    name: GPXSee Qt5 build
     runs-on: macos-10.15
     steps:
       - name: Set environment variables
@@ -27,5 +27,29 @@ jobs:
       - name: Upload artifacts
         uses: actions/upload-artifact@v2
         with:
-          name: GPXSee.dmg
+          name: GPXSee-qt5.dmg
+          path: GPXSee.dmg
+
+  qt6:
+    name: GPXSee Qt6 build
+    runs-on: macos-latest
+    steps:
+      - name: Set environment variables
+        run: echo "PATH=/usr/local/opt/qt@6/bin:$PATH" >> $GITHUB_ENV
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Install dependencies
+        run: brew install qt6
+      - name: Create localization
+        run: lrelease gpxsee.pro
+      - name: Configure build
+        run: qmake gpxsee.pro
+      - name: Build project
+        run: make -j3
+      - name: Create DMG
+        run: macdeployqt GPXSee.app -dmg
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: GPXSee-qt6.dmg
           path: GPXSee.dmg