chore: setup github actions for tests

.github/workflows/ci.yml

@@ -0,0 +1,54 @@
+name: Node.js CI
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        node-version:
+          - node/10
+          - node/12
+          - node/14
+          - node/15
+        compiler:
+          - gcc
+          - clang
+        os:
+          - ubuntu-16.04 # ubuntu-18.04/ubuntu-latest missing package g++-4.9
+          - macos-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install system dependencies
+      run: |
+        if [ "${{ matrix.compiler }}" = "gcc" -a "${{ matrix.os }}" = ubuntu-* ]; then
+          sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+          sudo apt-get update
+          sudo apt-get install g++-4.9
+        fi
+    - name: Use Node.js ${{ matrix.node-version }}
+      run: |
+        git clone --branch v1.4.2 --depth 1 https://github.com/jasongin/nvs ~/.nvs
+        . ~/.nvs/nvs.sh
+        nvs --version
+        nvs add ${{ matrix.node-version }}
+        nvs use ${{ matrix.node-version }}
+        node --version
+        npm --version
+        npm install
+    - name: npm test
+      run: |
+        if [ "${{ matrix.compiler }}" = "gcc" ]; then
+          export CC="gcc" CXX="g++"
+        fi
+        if [ "${{ matrix.compiler }}" = "gcc" -a "${{ matrix.os }}" = ubuntu-* ]; then
+          export CC="gcc-4.9" CXX="g++-4.9" AR="gcc-ar-4.9" RANLIB="gcc-ranlib-4.9" NM="gcc-nm-4.9"
+        fi
+        if [ "${{ matrix.compiler }}" = "clang" ]; then
+          export CC="clang" CXX="clang++"
+        fi
+        export CFLAGS="$CFLAGS -O3 --coverage" LDFLAGS="$LDFLAGS --coverage"
+        echo "CFLAGS=\"$CFLAGS\" LDFLAGS=\"$LDFLAGS\""
+        npm run pretest -- --verbose
+        node test

.github/workflows/linter.yml

@@ -4,6 +4,7 @@ on: [push, pull_request]
 
 jobs:
   lint:
+    if: github.repository == 'nodejs/node-addon-api'
     strategy:
       matrix:
         node-version: [14.x]