Add GitHub Actions CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,56 @@
+name: Cordova HTTP Plugin CI
+
+on: [push]
+
+env:
+  nodejs: '10.x'
+
+jobs:
+  test-www-interface:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Install Node.js ${{ env.nodejs }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ env.nodejs }}
+    - name: Install node modules
+      run: npm ci
+    - name: Run WWW interface tests
+      run: npm run testjs
+
+  build-ios:
+    runs-on: macOS-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Install Node.js ${{ env.nodejs }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ env.nodejs }}
+    - name: Install node modules
+      run: npm ci
+    - name: Update test cert for httpbin.org
+      run: npm run updatecert
+    - name: Build test app
+      run: scripts/build-test-app.sh --ios --emulator
+
+  build-android:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Install Node.js ${{ env.nodejs }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ env.nodejs }}
+    - name: Install node modules
+      run: npm ci
+    - name: Install JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Update test cert for httpbin.org
+      run: npm run updatecert
+    - name: Add workaround for mipsel reference
+      run: sudo mkdir -p $ANDROID_HOME/ndk-bundle/toolchains/mips64el-linux-android-4.9/prebuilt/linux-x86_64
+    - name: Build test app
+      run: scripts/build-test-app.sh --android --emulator