add tsc check

Author: keithamus

package.json

@@ -24,8 +24,9 @@
     ],
     "scripts": {
         "build": "tsc --build",
+        "check": "tsc --noEmit",
         "lint": "eslint . --ignore-path .gitignore",
-        "pretest": "npm run lint",
+        "pretest": "npm run lint && npm run check",
         "test": "wtr",
         "prepack": "npm run build",
         "postpublish": "npm publish --ignore-scripts --@github:registry='https://npm.pkg.github.com'"