update camelcase

lib/models/user.js

@@ -157,7 +157,7 @@ module.exports = function(crowi) {
   };
 
 
-  userSchema.methods.updateisEmailPublished = function(isEmailPublished, callback) {
+  userSchema.methods.updateIsEmailPublished = function(isEmailPublished, callback) {
     this.isEmailPublished = isEmailPublished;
     this.save(function(err, userData) {
       return callback(err, userData);