IntSuffix, FloatSuffix not pub

[aldanor]

Unless I'm missing something, there's no way to check e.g. that an int literal is unsuffixed, currently?.. (because IntSuffix and FloatSuffix are not re-exported and literal module is private).

[aldanor]

(Might also add something like .has_suffix() or .is_unsuffixed() for convenience? idk)

[Manishearth]

Yeah that would be great!