Vapor: 4.64.0 Release

This patch was authored by @K1NXZ and released by @0xTim.

Validate a regular expression pattern

Example: ```swift struct TestContent: Codable, Validatable { static func validations(_ validations: inout Validations) { validations.add("numbersOnly", as: String.self, is: .pattern("^[0-9]*$")) }

let numbersOnly: String

init(numbersOnly: String) {
    self.numbersOnly = numbersOnly
}

} ```