vchan.0.9.5

Signed-off-by: David Scott <dave.scott@citrix.com>
vchan only needs mirage-types, not mirage

Signed-off-by: David Scott <dave.scott@citrix.com>
+mirage.1.1.3
+mirage-types.1.1.3
vchan: add mirage-types version constraint
+vchan.0.9.6
vchan: ensure mirage-types.lwt is available
Merge pull request #2237 from avsm/djs55-vchan.0.9.5

vchan and mirage types releases