Fix accessor*, higher_kinded, and ppx_accessor packages.

[xclerc]

This pull requests fixes the following packages by adding a public_name stanza (See [1]):

• accessor;
• accessor_async;
• accessor_base;
• accessor_core;
• higher_kinded;
• ppx_accessor.

[1] https://discuss.ocaml.org/t/ann-v0-14-release-of-jane-street-packages/5893/9

[xclerc]

(Do not merge, this pull request needs additional commits.)

[camelus]

Commit: 6adf2fc

A pull request by opam-seasoned @xclerc.

☀️ All lint checks passed 6adf2fc

• These packages passed lint tests: accessor.v0.14.1, accessor_async.v0.14.1, accessor_base.v0.14.1, accessor_core.v0.14.1, higher_kinded.v0.14.1, ppx_accessor.v0.14.1

---

☀️ Installability check (+6)

• new installable packages (6): accessor.v0.14.1 accessor_async.v0.14.1 accessor_base.v0.14.1 accessor_core.v0.14.1 higher_kinded.v0.14.1 ppx_accessor.v0.14.1

[xclerc]

https://github.com/ocaml/opam-repository/pull/16562/commits/ba464086519e6fdc8d01b1d6apend557ea8b8fc06c67 is expected to fix the pending issues by:

• adding the missing applicative_without_return library (in accessor);
• updating the dependencies of the various packages.

[xclerc]

(The Travis error is a timeout.)

[kit-ty-kate]

thanks a lot! Sorry for the time this took, we had lots of issues in our CI