6.5 (05/03/2022)
----------------

  * Add support for OCaml 4.14 (#90, Kate Deplaix)

6.4 (04/08/2021)
----------------

  * Add support for OCaml 4.13 (#89, Kate Deplaix)

6.3 (18/11/2020)
----------------

  * Add support for OCaml 4.12 (#88, Kate Deplaix)
  * Merge the different implementations into a common folder (#87, Kate Deplaix)
    - ppx_tools now requires cppo to build
