Add support for lucid2

[lsmor]

Current lucid-xstatic depends on lucid. It would be nice to have a lucid2-xstatic package depending on lucid2 (or maybe a cabal flag). The only difference with respect using lucid or lucid2 is that lucid2 doesn't have with function, but it can be solved easily.

-- | Adds 'script_' and 'link_' for javascript and css files.
xstaticScripts :: [XStaticFile] -> Html ()
xstaticScripts = traverse_ xrender
  where
    xrender :: XStaticFile -> Html ()
    xrender xf =
        let src = "/xstatic" <> decodeUtf8 (xfPath xf)
         in case xfType xf of
             -- "application/javascript" -> with (script_ mempty) [src_ src]               -- implementation with lucid
                "application/javascript" -> Lucid.script_ [Lucid.src_ src] ("" :: Html ())    -- implementation with lucid2
                "text/css" -> Lucid.link_ [Lucid.href_ src, Lucid.rel_ "stylesheet"]
                _ -> pure ()

[TristanCacqueray]

@lsmor thank you for the suggestion, I agree it would be nice, a new lucid2-xstatic package sounds good to me. Though I'm still blocked by haskell-servant/servant-lucid#26

[TristanCacqueray]

Lucid2 is now supported with: https://hackage.haskell.org/package/lucid2-xstatic