message: add useConstraintAttrs to configuration docs
diff: @@ -22,6 +22,7 @@ const config = {
  inject: true,
  locale: 'en',
  validity: false
  + useConstraintAttrs: true
  };
  Vue.use(VeeValidate, config);
  @@ -42,7 +43,8 @@ Vue.use(VeeValidate, config);
  | i18nRootKey | `string` | `'validations'` | The key name of the validation messages for each locale. |
  | inject | `boolean` | `true` | Specifies if a validator instance should be injected automatically for all components. (See [Component Injections](/concepts/injections.md) for more information.) |
  | locale | `string` | `'en'` | The default language for the validation messages. |
  -| validity | `boolean` | `false` | Set custom validity [Constraint validation](https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/HTML5/Constraint_validation) on native HTML inputs. Also enables [rule inference](/guide/inferred-rules.md) on native HTML inputs. |
  +| validity | `boolean` | `false` | Set custom validity [Constraint validation](https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/HTML5/Constraint_validation) on native HTML inputs. |
  +| useConstraintAttrs | `boolean` | true | Enables [rule inference](/guide/inferred-rules.md) on native HTML inputs. |
  ## Installation
  