2.8.3

CHANGES:

• Make patdiff show refined diffs (#4257, fixes #4254, @hakuch)

• Fixed a bug that could result in needless recompilation under Windows due to
  case differences in the result of Sys.getcwd (observed under emacs).
  (#3966, @nojb).

• Restore compatibility with Coq < 8.10 for coq-lang < 0.3 , document
  that (using coq 0.3) does require Coq 8.10 at least (#4224, fixes
  #4142, @ejgallego)

• Add a META rule for 'compiler-libs.native-toplevel' (#4175, @AltGr)

• No longer call chmod on symbolic links (fixes #4195, @dannywillems)

• Dune no longer automatically create or edit dune-project files
  (#4239, fixes #4108, @jeremiedimino)

• Have dune communicate the location of the standard library directory to
  merlin (#4211, fixes #4188, @nojb)

• Workaround incorrect exception raised by Unix.utimes (OCaml PR#8857) in
  Path.touch on Windows (#4223, @dra27)

• dune ocaml-merlin is now able to provide configuration for source files in
  the _build directory. (#4274, @voodoos)

• Automatically delete left-over Merlin files when rebuilding for the first time
  a project previously built with Dune <= 2.7. (#4261, @voodoos, @aalekseyev)

• Fix ppx.exe being compiled for the wrong target when cross-compiling
  (#3751, fixes #3698, @toots)

• dune top correctly escapes the generated toplevel directives, and make it
  easier for dune top to locate C stubs associated to concerned libraries.
  (#4242, fixes #4231, @nojb)

• Do not pass include directories containing native objects when compiling
  bytecode (#4200, @nojb)