Update tsconfig to set rootDir for guest-js directory

Author: Choochmeque

tsconfig.json

@@ -1,5 +1,8 @@
 {
   "extends": "./tsconfig.base.json",
+  "compilerOptions": {
+    "rootDir": "./guest-js"
+  },
   "include": ["guest-js/*.ts"],
   "exclude": ["guest-js/*.test.ts"]
 }