Add test step to the CI

Author: marcelolx

.github/workflows/ci.yml

@@ -16,4 +16,6 @@ jobs:
           key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
       - run: yarn install
       - name: Lint
-        run: yarn lint
+        run: yarn lint
+      - name: Test
+        run: yarn test