Dune 1.1.1

Fix $ jbuilder --dev (#1104, fixes #1103, @rgrinberg)

Fix dune exec when --build-dir is set to an absolute path (#1105, fixes #1101, @rgrinberg)

Fix duplicate profile argument in suggested command when an external library is missing (#1109, #1106, @emillon)

-opaque wasn't correctly being added to modules without an interface. (#1108, fix #1107, @rgrinberg)

Fix validation of library name fields and make sure this validation also applies when the name is derived from the public_name. (#1110, fix #1102, @rgrinberg)

Fix a bug causing the toplevel env stanza in the workspace file to be ignored when at least one context had (merlin) (#1114, @diml)