CHANGES:
- Only print printable ASCII characters (#17 @copy)
- Improve error message with odd number of characters (#35 @dialohq)
- Raise lower bound to OCaml 4.08 (#37 @hannesm)
- Remove bigarray-compat dependency (#37 @hannesm)
- Remove "build" from dune dependency (#34 @craigfe)
- Improve documentation of
of_string
(#37 @hannesm, fixes #33 #36)