8.1.0

CHANGES:

• Add Fedora 36 and 37 and deprecate 34 and 35. (@MisterDA #125, #126)
• Add Ubuntu 22.10. (@MisterDA #124)
• Support STOPSIGNAL instruction. (@MisterDA #121, review by @avsm)
• Support HEALTHCHECK instruction. (@MisterDA #122, review by @avsm)
• Various LCU Updates, deprecate Windows 10 20H2
  (@mtelvers #128 #115 #109 #107)
• Update to bubblewrap 0.6.2 when building from source in a distro
  packaging an outdated version (@MisterDA #120)
• Add Alpine 3.16 (3.15 is now tier 2 and 3.14 is deprecated)
  (@raphael-proust #119)
• Refactor to be able to install Cygwin and OCaml for Windows in a
  separate multistage build image, then copy. Docker Engine 20.10.18
  for Windows is currently buggy and doesn't allow it.
  (@MisterDA #114)
• Support ARG Dockerfile instruction (@MisterDA #116 #117)
• Bump to OCaml 4.08 and remove dependencies on result and rresult (@MisterDA #106)
• Wrap libraries:
  • Dockerfile_gen from the dockerfile-cmd package becomes Dockerfile_cmd.Gen;
  • Dockerfile_distro, Dockerfile_linux, Dockerfile_windows from the
    dockerfile_opam package respectively become Dockerfile_opam.Distro,
    Dockerfile_opam.Linux, Dockerfile_opam.Windows. (@MisterDA #106, #113)
• Generate opam images using BuildKit 1.4 syntax for Dockerfiles. (@MisterDA #105)
• Support BuildKit 1.4 syntax of here-documents in COPY instructions. (@MisterDA #99)
• Support BuildKit 1.4 --link flag in ADD and COPY instructions. (@MisterDA #99)