add lint check

Author: vladimirvshivkov

.github/workflows/check.yaml

@@ -0,0 +1,13 @@
+name: CI
+on: push
+jobs:
+  check:
+    name: check
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install modules
+      run: yarn
+    - name: Run ESLint
+      run: node lint
+