perf: use node: prefix to bypass require.cache call for builtins (#114)

See fastify/fastify-static#407

Author: Fdawgs

index.js

@@ -1,6 +1,6 @@
 'use strict'
 
-const { format } = require('util')
+const { format } = require('node:util')
 
 function toString () {
   return `${this.name} [${this.code}]: ${this.message}`