Add gh workflows

Author: tony

.github/dependabot.yml

@@ -0,0 +1,8 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "11:00"
+  open-pull-requests-limit: 10

.github/workflows/node-ci.yaml

@@ -0,0 +1,51 @@
+name: tests
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2
+      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: Yarn cache
+      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: |
+          ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
+    - name: node_modules/ cache
+      uses: actions/cache@v2
+      id: node-modules-cache
+      with:
+        path: node_modules
+        key: ${{ runner.os }}-node-modules-${{ hashFiles('yarn.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-node-modules-${{ hashFiles('yarn.lock') }}
+    - name: project - install
+      run: yarn
+    - name: lint
+      run: |
+        yarn lint
+
+    - name: build
+      run: |
+        yarn build
+
+    - name: test
+      run: |
+        yarn test