[core] [api] Support OCaml 4.08

The changes are large due to `Pervasives` deprecation:

- the `Pervasives` module has been deprecated in favor of `Stdlib`, we
  have opted for introducing a few wrapping functions in `Util` and
  just unqualified the rest of occurrences. We avoid the shims as in
  the previous attempt.

- a bug regarding partial application have been fixed.

- some formatting functions have been deprecated, but previous
  versions don't include a replacement, thus the warning has been
  disabled.

We may want to clean up things a bit more, in particular
w.r.t. modules once we can move to OCaml 4.07 as the minimum required
version.

Note that there is a clash between 4.08.0 modules `Option` and `Int`
and Coq's ones. It is not clear if we should resolve that clash or
not, see PR #10469 for more discussion.

On the good side, OCaml 4.08.0 does provide a few interesting
functionalities, including nice new warnings useful for devs.

1 files changed, 1 insertions, 1 deletions

diff --git a/INSTALL b/INSTALL
index 0810b0b707..e7a9ea4ab2 100644
--- a/INSTALL
+++ b/INSTALL
@@ -9,7 +9,7 @@ WHAT DO YOU NEED ?
 
    - OCaml (version >= 4.05.0)
      (available at https://ocaml.org/)
-     (This version of Coq has been tested up to OCaml 4.07.0)
+     (This version of Coq has been tested up to OCaml 4.08.0)
 
    - The Num package, which used to be part of the OCaml standard library,
      if you are using an OCaml version >= 4.06.0