Feature: Decode logical Bool into a real Bool

[Andy0570]

I've added a Bool type auto-conversion function, so if people want to add it to their projects, I'll try pulling requests.

JSON	Swift
"false", "no", "0", "n", "f", 0, false	false
"true", "yes", "1", "y", "t", 1, true	true

import Foundation

@propertyWrapper
public struct BoolValue: Codable {
    public var wrappedValue: Bool

    public init(from decoder: Decoder) throws {
        let container = try decoder.singleValueContainer()
        if let stringifiedValue = try? container.decode(String.self) {
            switch stringifiedValue.lowercased() {
            case "false", "no", "0", "n", "f": wrappedValue = false
            case "true", "yes", "1", "y", "t": wrappedValue = true
            default:
                let description = "Expected to decode Bool but found a '\(stringifiedValue)' instead."
                throw DecodingError.dataCorruptedError(in: container, debugDescription: description)
            }
        } else if let integerifiedValue = try? container.decode(Int.self) {
            switch integerifiedValue {
            case 0: wrappedValue = false
            case 1: wrappedValue = true
            default:
                let description = "Expected to decode Bool but found a '\(integerifiedValue)' instead."
                throw DecodingError.dataCorruptedError(in: container, debugDescription: description)
            }
        } else {
            wrappedValue = try container.decode(Bool.self)
        }
    }

    public func encode(to encoder: Encoder) throws {
        try wrappedValue.encode(to: encoder)
    }
}

Usage:

@BoolValue var isFollow: Bool

[marksands]

We already have @LosslessBoolValue. I could add the logical strings as an additional decodable step. How does that sound? WIP here