add macOS+Windows

Author: Vladimir Kotal

.github/workflows/build.yml

@@ -3,7 +3,7 @@ name: Build
 on: push
 
 jobs:
-  build:
+  ubuntu:
     name: Ubuntu with Java 11
     runs-on: ubuntu-latest
     steps:
@@ -19,3 +19,35 @@ jobs:
       run: ./dev/before
     - name: Build
       run: ./dev/main
+  macos:
+    name: macOS with Java 11
+    runs-on: macos-latest
+    steps:
+    - name: Checkout master branch
+      uses: actions/checkout@v2
+    - name: Set up JDK 11
+      uses: actions/setup-java@v1
+      with:
+        java-version: 11
+    - name: Install pre-requisites
+      run: ./dev/before_install
+    - name: Before build actions
+      run: ./dev/before
+    - name: Build
+      run: ./dev/main
+  windows:
+    name: Windows with Java 11
+    runs-on: windows-latest
+    steps:
+    - name: Checkout master branch
+      uses: actions/checkout@v2
+    - name: Set up JDK 11
+      uses: actions/setup-java@v1
+      with:
+        java-version: 11
+    - name: Install pre-requisites
+      run: ./dev/before_install
+    - name: Before build actions
+      run: ./dev/before
+    - name: Build
+      run: ./dev/main