[BUG] DSL: required and optional operators dont unpack value

[HLWeil]

To Reproduce

(+.) id (Option.Some 5)

returns

val it: SheetEntity<Value> = Some ((String, "Some(45)"), [])

But the internal value should be only 45.

Solution
use parseAny

let inline (+.) (f : 'T -> 'U) (v : 'T) : SheetEntity<Value> =
    let err = fun s -> NoneRequired([message s])
    try 
        f v 
        |> parseAny err
    with 
    | err -> NoneRequired([Exception err])