Migrage travis to github actions (#637)

* move travis to github actions
* convert to github actions
* workaround timezone in tests
* drop support for node v4 for now
node_modules/jsdom/node_modules/tough-cookie/node_modules/punycode/punycode.js:133
const ucs2encode = codePoints => String.fromCodePoint(...codePoints);

.github/workflows/ci.yaml

@@ -0,0 +1,55 @@
+name: Node.js CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x, 22.x]
+
+    env:
+      FAIL_IF_DIST_MESSAGE: "These files are autogenerated. Please don't include changes to these files in your PR"
+      # Set the timezone to Eastern Standard Time since that is what the library expects
+      TZ: "America/New_York"
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Set up Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node-version }}
+
+    - name: Install dependencies
+      run: npm install
+
+    - name: Build project
+      run: npm run build
+
+    - name: Run tests
+      run: npm run coverage
+
+    - name: Run Coveralls
+      run: npm run coveralls
+
+    - name: Check for changed dist files
+      run: |
+        git fetch origin main --depth=1
+        # Check for changes in dist files, using grep's exit status directly
+        DIST_CHANGED=$(git diff --name-only HEAD origin/main | grep 'rickshaw\(\.min\)\?\.\(js\|css\)' || true)
+        if [ -n "$DIST_CHANGED" ]; then
+          echo -e "\033[31m${{ env.FAIL_IF_DIST_MESSAGE }}"
+          echo -e "\033[31mChanged files:"
+          echo "$DIST_CHANGED"
+          exit 1
+        fi