Bug fixes and improvements

• LBNF: empty tokens types are now forbidden [#388]
• Agda: support position information via --functor [#405]
• C/C++: use size_t and -Wsign-conversion [#391]
• C++: repair broken --line-numbers [#390], regression in 2.9.2 by [#349]
• Haskell: fix a problem with layout stop words and top-level layout [#399,#413]
• Haskell: generated test parser can parse several files now [#400]
• Java: use L.valueOf() instead of deprecated new L() for literal classes L [#402]
• Ocaml: non-terminals in generated parser are now type-annotated [#407]
• Ocaml: sanitize bound variables in define
• Ocaml/Menhir: update parse error mechanism to Menhir 2021/12/30 [#414]

Contributors:

• Michał Radwański [#390,#391]
• Beatrice Vergani [#399,#400]