mac build bots

.github/workflows/chromium-mac.yml

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+name: Chromium Mac Tests
+
+on:
+  push:
+    branches: 
+      - master
+  pull_request:
+    branches: 
+      - master
+
+jobs:
+  build:
+
+    runs-on: macos
+
+    strategy:
+      matrix:
+        node-version: [12.x]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+
+    - name: npm install, and test
+      run: |
+        npm install
+        npm run ctest
+      env:
+        CI: true

.github/workflows/firefox-mac.yml

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+name: Firefox Mac Tests
+
+on:
+  push:
+    branches: 
+      - master
+  pull_request:
+    branches: 
+      - master
+
+jobs:
+  build:
+
+    runs-on: macos
+
+    strategy:
+      matrix:
+        node-version: [12.x]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+
+    - name: npm install, and test
+      run: |
+        npm install
+        npm run ftest
+      env:
+        CI: true

.github/workflows/webkit-mac.yml

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+name: WebKit Mac Tests
+
+on:
+  push:
+    branches: 
+      - master
+  pull_request:
+    branches: 
+      - master
+
+jobs:
+  build:
+
+    runs-on: macos
+
+    strategy:
+      matrix:
+        node-version: [12.x]
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+
+    - name: npm install, and test
+      run: |
+        npm install
+        npm run wtest
+      env:
+        CI: true