Use github workflow for CI/CD

.github/workflows/ci-cd.yml

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+# inspired from https://github.com/eclipse-theia/theia-cpp-extensions/raw/master/.github/workflows/ci-cd.yml
+# and https://github.com/theia-ide/theia-trace-extension/raw/master/.github/workflows/build.yml
+
+name: CI-CD
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        node-version: [12.x]
+
+    steps:
+    - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          persist-credentials: false
+
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+
+    - name: Get yarn cache directory path
+      id: yarn-cache-dir-path
+      run: echo "::set-output name=dir::$(yarn cache dir)"
+
+    - name: Cache node_modules with yarn
+      uses: actions/cache@v2
+      id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
+      with:
+        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-yarn-
+    - run: yarn build --frozen-lockfile
+
+      env:
+        CI: true
+
+  publish:
+    needs: build
+    if: ${{ github.event_name == 'push' }}
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node: [12]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          persist-credentials: false
+
+      - name: Use Node.js ${{ matrix.node }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Pre-Publish 
+        shell: bash
+        run: yarn build
+        env:
+          NODE_OPTIONS: --max_old_space_size=4096
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # https://github.com/microsoft/vscode-ripgrep/issues/9
+
+      - name: Publish
+        uses: nick-invision/retry@v2
+        with:
+          timeout_minutes: 5
+          retry_wait_seconds: 60
+          max_attempts: 3
+          retry_on: error
+          command: yarn run publish:next
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }} # The variable name comes from here: https://github.com/actions/setup-node/blob/70b9252472eee7495c93bb1588261539c3c2b98d/src/authutil.ts#L48