Migrate to GitHub Actions

.github/workflows/ci.yml

@@ -0,0 +1,72 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version:
+          - 10.x
+          - 12.x
+          - 14.x
+          - 15.x
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm ci
+      - run: npm run build
+      - run: npm run bundlesize
+      - name: Save build
+        if: matrix.node-version == '14.x'
+        uses: actions/upload-artifact@v2
+        with:
+          name: build
+          path: |
+            .
+            !node_modules
+          retention-days: 1
+
+  gh-pages:
+    needs: test
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/master'
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: build
+      - run: rm .gitignore
+      - uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: .
+
+  npm:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: build
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 14.x
+      - uses: rlespinasse/github-slug-action@v3.x
+      - name: Append commit hash to package version
+        run: 'sed -i -E "s/(\"version\": *\"[^\"]+)/\1-${GITHUB_SHA_SHORT}/" package.json'
+      - name: Disable pre- and post-publish actions
+        run: 'sed -i -E "s/\"((pre|post)publish)/\"ignore:\1/" package.json'
+      - uses: RubenVerborgh/npm-publish@fix/unpublished-version
+        with:
+          token: ${{ secrets.NPM_TOKEN }}
+          tag: ${{ env.GITHUB_REF_SLUG }}