2.1.0

CHANGES:

• Attach cinaps stanza actions to both @runtest and @cinaps aliases
  (#2831, @NathanReb)

• Add variables %{lib-private...} and %{libexec-private...} for finding
  build paths of files in public and private libraries within the same
  project. (#2901, @snowleopard)

• Add --mandir option to $ dune install. This option allows to override the
  installation directory for man pages. (#2915, fixes #2670, @rgrinberg)

• Fix dune --version. The bootstrap didn't compute the version
  correctly. (#2929, fixes #2911, @diml)

• Do not open the log file in dune clean. (#2965, fixes #2964 and
  #2921, @diml)

• Support passing two arguments to =, <>, ... operators in package
  dependencies so that we can have things such as (<> :os win32)
  (#2965, @diml)