Flag deprecated packages as deprecated

[kit-ty-kate]

Discussed in:

• Detect and filter out deprecated packages ocurrent/opam-health-check#8
• [feature request] 'deprecated' flag opam#4522

Implemented as a builtin flag in opam in: ocaml/opam#4523

This PR should not have any effect on any of the packages from opam 2.0 to opam 2.1.0~beta4 and is just there for external tools support for the moment. If ocaml/opam#4523 gets merged, these packages will still be available, just avoided, if possible, by the solver.

[camelus]

Commit: a490749

Good to see you Madam.

🌩️ opam-lint errors a490749

• mirage-conduit.3.1.0 has errors:

  • error 57: Synopsis and description must not be both empty

• charrua-core.0.1 has some warnings:

  • warning 47: Synopsis (or description first line) should start with a capital and not end with a dot

• charrua-core.0.3 has some warnings:

  • warning 47: Synopsis (or description first line) should start with a capital and not end with a dot

• charrua-core.0.4 has some warnings:

  • warning 47: Synopsis (or description first line) should start with a capital and not end with a dot

• charrua-core.0.5 has some warnings:

  • warning 47: Synopsis (or description first line) should start with a capital and not end with a dot

• io-page-xen.0.1.0 has some warnings:

  • warning 25: Missing field 'authors'
  • warning 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• io-page-xen.0.9.9 has some warnings:

  • warning 25: Missing field 'authors'
  • warning 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• lwt-zmq.1.0-beta3 has some warnings:

  • warning 25: Missing field 'authors'
  • warning 36: Missing field 'bug-reports'

• lwt-zmq.1.0-beta4 has some warnings:

  • warning 25: Missing field 'authors'
  • warning 36: Missing field 'bug-reports'

• lwt-zmq.1.0.0 has some warnings:

  • warning 36: Missing field 'bug-reports'

• lwt-zmq.2.0.0 has some warnings:

  • warning 36: Missing field 'bug-reports'

• mirage-conduit.2.0.0 has some warnings:

  • warning 25: Missing field 'authors'
  • warning 35: Missing field 'homepage'
  • warning 36: Missing field 'bug-reports'

• These packages passed lint tests: charrua-core.0.10, charrua-core.0.11.0, charrua-core.0.11.1, charrua-core.0.11.2, charrua-core.0.12.0, charrua-core.0.6, charrua-core.0.7, charrua-core.0.8, charrua-core.0.9, configurator.v0.10.0, configurator.v0.11.0, configurator.v0.9.0, configurator.v0.9.1, expect_test_helpers.v0.10.0, expect_test_helpers.v0.11.0, expect_test_helpers.v0.12.0, expect_test_helpers.v0.13.0, expect_test_helpers.v0.9.0, expect_test_helpers_kernel.v0.10.0, expect_test_helpers_kernel.v0.11.0, expect_test_helpers_kernel.v0.12.0, expect_test_helpers_kernel.v0.13.0, expect_test_helpers_kernel.v0.9.0, io-page-xen.2.0.0, io-page-xen.2.0.1, io-page-xen.2.1.0, io-page-xen.2.2.0, io-page-xen.2.3.0, lwt-zmq.2.0.1, lwt-zmq.2.1.0, mirage-conduit.1.0.3, mirage-conduit.1.3.0, mirage-conduit.2.1.0, mirage-conduit.2.2.0, mirage-conduit.2.3.0, mirage-conduit.2.3.1, mirage-conduit.3.0.0, mirage-conduit.3.0.1, mirage-conduit.3.2.0, mirage-xen-ocaml.2.3.0, mirage-xen-ocaml.2.3.1, mirage-xen-ocaml.2.3.4, mirage-xen-ocaml.2.6.0, mirage-xen-ocaml.3.0.0, mirage-xen-ocaml.3.0.4, mirage-xen-ocaml.3.0.5, mirage-xen-ocaml.3.0.6, mirage-xen-ocaml.3.1.0, mirage-xen-ocaml.3.2.0, mirage-xen-ocaml.3.3.0, mirage-xen-ocaml.3.3.1, mirage-xen-ocaml.3.3.2, mirage-xen-ocaml.3.3.3, named-pipe.0.2, named-pipe.0.3, named-pipe.0.4.0

---

☀️ Installability check (+0)

[kit-ty-kate]

accepted on principal by the opam devs. Can always be changed/reverted if need be.