--version: print hslua version.

This will help us determine which version of Lua pandoc
is compiled against. See #7929.

src/Text/Pandoc/App/CommandLineOptions.hs

@@ -989,7 +989,7 @@ compileInfo =
   "\nCompiled with pandoc-types " ++ VERSION_pandoc_types ++
   ", texmath " ++ VERSION_texmath ++ ", skylighting " ++
   VERSION_skylighting ++ ",\nciteproc " ++ VERSION_citeproc ++
-  ", ipynb " ++ VERSION_ipynb
+  ", ipynb " ++ VERSION_ipynb ++ ", hslua " ++ VERSION_hslua
 
 handleUnrecognizedOption :: String -> [String] -> [String]
 handleUnrecognizedOption "--smart" =