0.3.2

CHANGES:

• freenstanding support does not need opam (@sternenseemann, @dinosaure, #53)
• Fix big-endian support (@dinosaure, #56)
• Use which when command -v is not available (@dinosaure, @sternenseemann, @mseri, #56)
• Fix esy support and on its environment the MirageOS 3 support (@dinosaure, @mseri, #56)
• Upgrade to ocamlformat.0.19.0 (@dinosaure, #57)