Fix eslint default-case in es5 files

[MAILPOET-1145]

.eslintrc.es5.json

@@ -32,7 +32,6 @@
     "no-useless-escape": 0,
     "wrap-iife": 0,
     "no-plusplus": 0,
-    "default-case": 0,
     "brace-style": 0,
     "space-infix-ops": 0
   }

assets/js/src/modal.js

@@ -340,6 +340,7 @@ define('modal', ['mailpoet', 'jquery'],
             }
             jQuery('#mailpoet_panel').css({ minHeight: 'auto' });
             break;
+          default: throw new Error('Incorrect type');
         }
 
         return this;
@@ -376,6 +377,7 @@ define('modal', ['mailpoet', 'jquery'],
               }
             }.bind(this), 0);
             break;
+          default: throw new Error('Incorrect type');
         }
 
         return this;

assets/js/src/notice.js

@@ -151,6 +151,9 @@ define('notice', ['mailpoet', 'jquery'], function (mp, jQuery) { // eslint-disab
         case 'error':
           this.element.addClass('notice notice-error');
           break;
+        default:
+          this.element.addClass('notice');
+          break;
       }
 
       // make the notice appear