check types before build

Author: sungoki

.github/workflows/main.yml

@@ -25,6 +25,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-modules-
       - run: yarn install
+      - run: yarn typecheck
       - run: yarn build
       - run: yarn lint:ci
       - run: yarn doctor

package.json

@@ -34,6 +34,7 @@
     "build": "lerna run build",
     "lint": "eslint --cache .",
     "lint:ci": "eslint --cache . --max-warnings=0",
+    "typecheck": "tsc",
     "prepare": "husky install"
   },
   "lint-staged": {