ci: replace travis with github actions

.github/workflows/nodejs.yml

@@ -0,0 +1,83 @@
+name: Node.js CI
+
+on: [push]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v1
+      with:
+        node-version: "12.14.1"
+    - uses: actions/cache@v1
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - run: npm ci
+    - name: eslint
+      run: npx eslint .
+    - name: test
+      run: npm test
+      env:
+        CI: true
+    - uses: actions/upload-artifact@v1
+      with:
+        name: coverage
+        path: .nyc_output
+  coverage:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v1
+      with:
+        node-version: "12.14.1"
+    - uses: actions/cache@v1
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - run: npm ci
+    - uses: actions/download-artifact@v1
+      with:
+        name: coverage
+        path: .nyc_output
+    - name: coverage
+      run: |
+        npm i -g coveralls
+        npx nyc check-coverage
+        npx nyc report > lcov.info
+        coveralls < lcov.info
+      env:
+        CI: true
+        COVERALLS_REPO_TOKEN: ${{ secrets. COVERALLS_REPO_TOKEN }}
+  release:
+    if: github.ref == 'refs/heads/master'
+    needs: coverage
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: "12.14.1"
+      - uses: actions/cache@v1
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+      - run: npm ci
+      - run: npx semantic-release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}