Version 0.2.0

Updated do and main to take in a closure that can throw and error.

func `do`<T>(withDelay delay: UInt32 = 0,
                        work: @escaping () throws -> T) -> LaterValue<T> 
    
func `do`(withDelay delay: UInt32 = 0,
                     work: @escaping () throws -> Void) -> LaterValue<Void> 

func main(withDelay delay: UInt32 = 0,
                     work: @escaping () throws -> Void) -> LaterValue<Void> 

Calls that provide a failure response

• do
• main
• post

Later/ Tests now support Linux.