Update gradle.yml

Author: h0tk3y

.github/workflows/gradle.yml

@@ -1,26 +1,28 @@
 # This workflow will build a Java project with Gradle
 # For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
 
-name: Java CI with Gradle
+name: Gradle build
 
 on:
   push:
     branches: [ master ]
   pull_request:
     branches: [ master ]
 
+# .github/workflows/gradle-build-pr.yml
 jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
+  gradle:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v2
-    - name: Set up JDK 1.8
-      uses: actions/setup-java@v1
+    - uses: actions/setup-java@v1
       with:
-        java-version: 1.8
+        java-version: 11
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
-    - name: Build with Gradle
-      run: ./gradlew build
+    - uses: eskatos/gradle-command-action@v1
+      with:
+        arguments: build