version 0.2.1

Update opam file to constrain ocaml version >= 4.02.1

version 0.2.0

Runtime adapted for new ocaml-protoc version 2. This runtime is now independent of ocaml-protoc runtime since we dropped the Functor approach.

Version 0.1.0

Initial version of the Encoder/Decoder modules to implement the runtime required by ocaml-protoc generated code.