message: allow email rule to handle array of values
diff: import isEmail from 'validator/lib/isEmail';
  -export default (value) => isEmail(String(value));
  +const validate = (value) => {
  + if (Array.isArray(value)) {
  + return value.every(val => isEmail(String(val)));
  + }
  +
  + return isEmail(String(value));
  +};
  +
  +export default validate;
  