Added (unsigned) build for mac

.github/workflows/release.yml

@@ -6,10 +6,33 @@ on:
       - '*'
 
 jobs:
+  macos-build:
+    runs-on: macos-latest
+    steps:
+      - name: Setup JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+
+      - name: Check out sources...
+        uses: actions/checkout@v2
+
+      - name: Build with Gradle
+        run: ./gradlew createDmg -PprojectVersion=%GITHUB_REF:*tags/=%
+
+      - name: Upload binaries to release
+        uses: svenstaro/upload-release-action@v1-release
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          file: build/distributions/*.dmg
+          tag: ${{ github.ref }}
+          overwrite: true
+          file_glob: true
+
   windows-build:
     runs-on: windows-latest
     steps:
-      - name: Set up JDK 11
+      - name: Setup JDK 11
         uses: actions/setup-java@v1
         with:
           java-version: 11