Test package with tsc

Validate the @ts-expect-error directives in e2e.spec.ts

Author: wimpyprogrammer

.github/workflows/tests.yml

@@ -35,7 +35,7 @@ jobs:
       - run: npm run lint
       - run: npm run build
       - run: npm run test
-      - run: npx testpack-cli --keep={@babel/*,ts-jest,typescript} .babelrc tsconfig*.json src/e2e.spec.ts
+      - run: npx testpack-cli --test-script=test-package --keep={@babel/*,ts-jest,typescript} .babelrc tsconfig*.json src/e2e.spec.ts
 
       - name: Upload test coverage report to Codecov
         uses: codecov/codecov-action@v1

package.json

@@ -35,7 +35,8 @@
     "prepublishOnly": "publish-please guard",
     "publish-please": "publish-please",
     "publish-please-prereqs": "npm run lint && npm run test && npm run build",
-    "test": "jest --coverage"
+    "test": "jest --coverage",
+    "test-package": "tsc -b ./tsconfig.lint.json && jest --coverage"
   },
   "devDependencies": {
     "@babel/cli": "^7.13.10",