Allow restricting classes by regexp in vue/no-restricted-class #2013 
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Closes #1877
This PR adds support for RegEx to the
no-restricted-classrule and an update to the example in the docs.I didn't add all the
buildMatcherlogic like in the example linked in the Issue (no-restricted-custom-event: https://github.com/vuejs/eslint-plugin-vue/blob/master/lib/rules/no-restricted-custom-event.js) because this rule seemed a little more straightforward.Please let me know if you need anything else. Thanks!