[Caml-list] [ANN] Merlin 2.5.0 with OCaml 4.03.0 support

[Caml-list] [ANN] Merlin 2.5.0 with OCaml 4.03.0 support

[Frédéric Bour]

Merlin is an editor-independent tool to ease the developement of 
programs in OCaml. It aims at providing features available in modern 
IDEs such as: "as you type" error reporting, auto completion, source 
browsing ("jump to definition"), extraction of type, ...

Merlin is available on opam and can be installed with `opam install 
merlin`. It can also be built from sources, available at 
https://github.com/the-lambda-church/merlin .

As always you can find a full changelog at 
https://github.com/the-lambda-church/merlin/blob/master/CHANGELOG , but 
the highlights are:

- Most notable is support for 4.03 and 4.02.
   Older versions are dropped.

- Patches on OCaml frontend were rewritten from scratch.
   Behavior of typechecker and ppx extensions should be closer to the 
compiler.

- Introduction of an infrastructure for plugging custom preprocessors.
   This feature is currently being used for Reason[1] support.

# Editor support

*Emacs*, *Vim* and *NeoVim* are directly supported.
This version introduces support for Vim built with python 3.

*Sublime Text* plugin is contributed by [2].

*Visual Studio Code* extension is contributed by [3].

Multiple contributions are offering *Atom* support.
See [4] for more information.

Many thanks to all contributors, including Anton Bachin, Benjamin San 
Souci, Chris Konstad, Hackwaly, Jordan Walke, Mario Rodas and Rudi 
Grinberg. We also thank JaneStreet for their continued support.

[1]: http://facebook.github.io/reason
[2]: https://github.com/cynddl/sublime-text-merlin
[3]: https://marketplace.visualstudio.com/items?itemName=hackwaly.ocaml
[4]: https://github.com/the-lambda-church/merlin/wiki/atom-from-scratch