Bug#918770: ocaml-migrate-parsetree: build-dep on opam-installer

[Ralf Treinen <treinen@free.fr>]

Source: ocaml-migrate-parsetree
Version: 1.2.0-1
Severity: wishlist

The package build-depends on opam, which is not installable on some
architecures [1]. These architecures are not release architecures,
hence this is only wishlist.

I strongly suspect that this build-dependency can be replaced by
opam-installer which has much less dependencies. This might make
the package build on all architectures.

-Ralf.

[1] https://buildd.debian.org/status/package.php?p=ocaml-migrate-parsetree&suite=sid