fix: fix usage of cmd-shim (#6137)

Author: fangbinwei

packages/@vue/cli/lib/util/linkBin.js

@@ -3,7 +3,7 @@
 
 const fs = require('fs-extra')
 const path = require('path')
-const cmdShim = require('util').promisify(require('cmd-shim'))
+const cmdShim = require('cmd-shim')
 
 exports.linkBin = async (src, dest) => {
   if (!process.env.VUE_CLI_TEST && !process.env.VUE_CLI_DEBUG) {