spike: use babel preset typescript to transpile app (#4142)

* use babel-preset-typescript

* run type-check in release process

.github/workflows/release-core.yml

@@ -30,6 +30,8 @@ jobs:
           node-version: ${{ steps.nvm.outputs.NVMRC }}
       - name: Bootstrap packages
         run: npm run bootstrap
+      - name: Type checks
+        run: npm run type-check
       - name: Run tests
         run: npm test
   

.github/workflows/test.yml

@@ -54,6 +54,9 @@ jobs:
       - name: Lint markdown
         run: npm run lint:markdown
 
+      - name: Type checks
+        run: npm run type-check
+
       - name: Run tests
         run: npm test