Changes in ocaml-lablgtk:

• Built without gnomeui support, due to the pending retirement of libgnomeui

Changes in ocaml-cairo 0.6.2:

• Fix a memory leak (#19).
• Fix GCC warnings, in particular the “multiple definition of …” (#23).
• Clarify the license.
• Use dune-configurator.

Changes in ocaml-camlimages 5.0.4:

• See https://gitlab.com/camlspotter/camlimages/-/blob/hg-b4.2.6/Changes.txt

Changes in ocaml-ocamlnet 4.1.9:

• Support for OCaml-4.12 (thanks to kate)
• Disable TLS-1.3 because it created connection problems
• Supporess E_GNUTLS_PREMATURE_TERMINATION errors
• Fixing build of cmxs archives (Jerome Voillon)
• Some fixes for netcgi2-apache (Eike Ritter)
• Searching gmake on BSD systems (madroach)

All other package builds are simple rebuilds due to the ocaml-lablgtk change.