Add ts-check to build script

Build/lib/is-domain-loose.js

@@ -1,10 +1,16 @@
+// @ts-check
 const { parse } = require('tldts');
 
+/**
+ * @param {string} domain
+ */
 module.exports.isDomainLoose = (domain) => {
   const { isIcann, isPrivate, isIp } = parse(domain, { allowPrivateDomains: true });
   return !!(!isIp && (isIcann || isPrivate));
 };
-
+/**
+ * @param {string} domain
+ */
 module.exports.normalizeDomain = (domain) => {
   if (domain == null) {
     return null;