Simplify array creation methods
Simplify array creation methods

dictav/MessagePack.swift,joneshq/MessagePack.swift,antonmes/MessagePack,a2/MessagePack.swift,hibento/MessagePack.swift,dictav/MessagePack.swift,joneshq/MessagePack.swift,joneshq/MessagePack.swift,hibento/MessagePack.swift,dictav/MessagePack.swift,a2/MessagePack.swift