👷 Add linting to the CI

.github/workflows/ci.yml

@@ -1,18 +1,27 @@
-name: Test
+name: CI
 
 on:
   push:
+  pull_request:
   workflow_dispatch:
 
 jobs:
-  unit:
+  general:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout 🛎️
         uses: actions/checkout@v2.3.1
 
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 'lts/*'
+          cache: 'yarn'
+
       - name: Install dependencies
-        run: yarn
+        run: yarn --frozen-lockfile
 
       - name: Test
         run: yarn test
+
+      - name: Lint
+        run: yarn lint