OCamlbuild 0.15.0 comes with first class support for native Windows ports of OCaml (MinGW64-w64 and MSVC). This support was historically provided by opam-repository-mingw.

• Misc: restore CI (unix, macos, windows) (#328, #329, #336, #349 by Hugo Heuzard)

• Remove degraded mode for windows (#333 by Hugo Heuzard)

• Remove light mode (#332 by Hugo Heuzard)
• Make the codebase work on windows native (#329, #333, #334, #338, #339, #342, #343, #344 by Hugo Heuzard)

• No longer treat empty path in PATH env variable as the current working directory (#339 by Hugo Heuzard)

• Emit a warning if several calls are made to Ocamlbuild_plugin.dispatch -- all calls before the last one are ignored, which may not be what users expect. (#30 by Gabriel Scherer, review by whitequark)
• Rename user-rebindable {LINK,COMP}FLAGS into OCB_{LINK,COMP}FLAGS (#303 by Gabriel Scherer)