Updated the bundled Uno C++ solver to upstream release 2.7.3. The
R-packaging patch set was rebased onto v2.7.3; the C API is
backward-compatible (the binding is unchanged). One internal fix: Uno
2.7.3 relocated Options::dump_default_options(), so its
console output is re-routed through the R-output mechanism
(UNO_COUT) to keep the compiled library free of raw
std::cout for the CRAN compiled-code check.
Added inst/COPYRIGHTS documenting the copyright
holders and licenses of the bundled third-party libraries: the Uno C++
solver and HiGHS, including the components HiGHS itself bundles (AMD,
METIS, pdqsort, zstr, rcm, filereaderlp, Catch2, and CLI11). All are
permissive and MIT-compatible (MIT / BSD-3-Clause / Apache-2.0 / zlib /
Boost Software License 1.0); none is copyleft. A
Copyright: file inst/COPYRIGHTS field and a
cph entry for the HiGHS development team record this in the
package metadata. Because the file lives under inst/, the
attribution survives installation. MUMPS (reached at run time through
the GPL-licensed rmumps package) and BQPD are not
bundled.