fix: add an emits option to style guide examples that use $emit (#941)

Author: skirtles-code

src/style-guide/README.md

@@ -1583,6 +1583,8 @@ app.component('TodoItem', {
     }
   },
 
+  emits: ['input'],
+
   template: `
     <input
       :value="todo.text"
@@ -1601,6 +1603,8 @@ app.component('TodoItem', {
     }
   },
 
+  emits: ['delete'],
+
   template: `
     <span>
       {{ todo.text }}