TextAreaElementConfig is missing a HasSetValue instance

[hannes-steffenhagen-diffblue]

TextAreaElementConfig should have a HasSetValue instance like this:

instance HasSetValue (TextAreaElementConfig er t m) where
  type SetValue (TextAreaElementConfig er t m) = Maybe (Event t T.Text)
  setValue f conf = fmap
    (\sv -> conf { _textAreaElementConfig_setValue = sv }) -- set
    . f $ _textAreaElementConfig_setValue conf -- get

In general it looks like there are a bunch of Has* instances missing from the Reflex.Dom.Builder.Class module, but maybe I'm just not looking in the right place for them?