[new release] xenstore (2.1.0) (#13371)
[new release] xenstore (2.1.0) (#13371)

CHANGES:

* Upgrade opam metadata to 2.0 format (@avsm)
* Port build from jbuilder to Dune (@avsm)
* Test on OCaml 4.07 (@avsm)
* Remove topkg metadata in favour of dune-release (@avsm)

fdopen/opam-repository-mingw,fdopen/opam-repository-mingw