Added macOS ARM64 workflow (#2432)

.github/workflows/mac-dmg.yml

@@ -14,17 +14,28 @@ env:
 
 jobs:
   build:
-    name: Build Cryptomator.app
-    runs-on: macos-11
+    name: Build Cryptomator.app for ${{ matrix.output-suffix }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: true
+      matrix:
+        include:
+        - os: macos-11
+          architecture: x64
+          output-suffix: x64
+        - os: [self-hosted, macOS, ARM64]
+          architecture: aarch64
+          output-suffix: arm64
     steps:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0
       - name: Setup Java
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
           java-version: ${{ env.JAVA_VERSION }}
+          architecture: ${{ matrix.architecture }}
           cache: 'maven'
       - id: versions 
         name: Apply version information
@@ -186,7 +197,7 @@ jobs:
           --icon ".background" 128 758
           --icon ".fseventsd" 320 758
           --icon ".VolumeIcon.icns" 512 758
-          Cryptomator-${VERSION_NO}.dmg dmg
+          Cryptomator-${VERSION_NO}-${{ matrix.output-suffix }}.dmg dmg
         env:
           VERSION_NO: ${{ steps.versions.outputs.semVerNum }}
       - name: Notarize .dmg
@@ -198,7 +209,7 @@ jobs:
           password: ${{ secrets.MACOS_NOTARIZATION_PW }}
           team-id: ${{ secrets.MACOS_NOTARIZATION_TEAM_ID }}
       - name: Add possible alpha/beta tags to installer name
-        run: mv Cryptomator-*.dmg Cryptomator-${{ steps.versions.outputs.semVerStr }}.dmg
+        run: mv Cryptomator-*.dmg Cryptomator-${{ steps.versions.outputs.semVerStr }}-${{ matrix.output-suffix }}.dmg
       - name: Create detached GPG signature with key 615D449FE6E6A235
         run: |
           echo "${GPG_PRIVATE_KEY}" | gpg --batch --quiet --import
@@ -213,7 +224,7 @@ jobs:
       - name: Upload artifacts
         uses: actions/upload-artifact@v3
         with:
-          name: dmg
+          name: dmg-${{ matrix.output-suffix }}
           path: Cryptomator-*.dmg
           if-no-files-found: error
       - name: Publish dmg on GitHub Releases
@@ -225,5 +236,3 @@ jobs:
           files: |
             Cryptomator-*.dmg
             Cryptomator-*.asc
-
-