Update gh action

Author: pdziewa

.github/workflows/ci.yml

@@ -26,5 +26,11 @@ jobs:
       - name: Install deps and build (with cache)
         uses: bahmutov/npm-install@v1
 
+      - name: Typecheck
+        run: npm run typecheck
+
       - name: Test package
         run: npm run test
+
+      - name: Lint
+        run: npm run lint

package.json

@@ -15,6 +15,7 @@
     "lint": "eslint .",
     "test": "jest",
     "test:watch": "jest --watchAll --verbose",
+    "typecheck": "tsc --noEmit",
     "prepublishOnly": "npm run lint && npm run test"
   },
   "dependencies": {