Added max length validation to snippet's name field

app/validators/snippet.js

@@ -1,14 +1,23 @@
 import BaseValidator from './base';
+import validator from 'validator';
 import {isBlank} from '@ember/utils';
 
 export default BaseValidator.create({
     properties: ['name', 'mobiledoc'],
 
     name(model) {
-        if (isBlank(model.get('name'))) {
+        let {name} = model;
+
+        if (!validator.isLength(name || '', 0, 191)) {
+            model.errors.add('name', 'Name cannot be longer than 191 characters');
+            this.invalidate();
+        }
+
+        if (isBlank(name)) {
             model.errors.add('name', 'Name cannot be blank');
             this.invalidate();
         }
+
         model.get('hasValidated').addObject('name');
     },