How to auto tag up OCaml project? -

i have convenient way manage version of ocaml project.

it like

1. current version dev version, 1.0.0.dev
2. then somehow can use tool auto tag version 1.0.1
3. after tag up, there new tag (1.0.1) in git
4. and can ready opam publish

i wondering whether ocaml world has such tool. or there can use purpose?

currently doing manual.