4.0.0
CHANGES:
- Modernise build for OCaml 4.04 and port to Dune (#120 @talex5 @avsm)
- Upgrade opam metadata files to 2.0 (#120 @avsm @talex5)
- Remove mli only module (#114 @rgrinberg @samoht)
- Fix deprecation warning on String.create (#112 @samoht)
- Make OCaml 4.04 the minimum version (#111 @cfcs @hannesm)
- Update test cases for Mirage 3 (#110 @mneilsen)