Using labels in error messages

[Abdullah0sama]

Hello,
I implemented the feature mentioned in issue #209 .
Using label in messages instead of property name.

const schema = {
	email: { type: "email", label: "Email Address" },
};
const check = v.compile(schema);
check({ email: "notAnEmail" });
/* Returns
[
  {
    type: 'email',
    message: "The 'Email Address' field must be a valid e-mail.",
    field: 'email',
    actual: 'notAnEmail',
    label: 'Email Address'
  }
]
*/

[icebob]

Good job, could you add it to the readme docs as well?

[Abdullah0sama]

@icebob Done!