fix[notEmpty]: set trim => trim()

Author: qige2016

plop-templates/utils.js

@@ -1,6 +1,6 @@
 exports.notEmpty = name => {
   return v => {
-    if (!v || v.trim === '') {
+    if (!v || v.trim() === '') {
       return `${name} is required`
     } else {
       return true