Add support for captcha_widget_theme property in colors within themes schema (#906)

* feat(auth0-deploy-cli): add captcha_widget_theme property to colors object

* fix linting

* added testcase

Author: developerkunal

src/tools/auth0/handlers/themes.ts

@@ -295,6 +295,7 @@ export const schema = {
           'success',
           'widget_background',
           'widget_border',
+          'captcha_widget_theme'
         ],
         type: 'object',
       },