graphviz-2.48.0

[Bruce Dubbs]

New minor version.

[Bruce Dubbs]

2.48.0] - 2021-07-17

### Added

• a new C++ test infrastructure based on ctest and Catch2 towards #2002
• support for test coverage analysis with [lcov](​http://ltp.sourceforge.net/coverage/lcov.php) and [test coverage visualization in GitLab MRs](​https://docs.gitlab.com/ee/user/project/merge_requests/test_coverage_visualization.html)

### Changed

• updated Graphviz bug report URL in the Autotools build system
• Fix WIN32 path of gvc.def specified in libgvc_la_LDFLAGS
• the CMake build system now not only checks for Bison, but also ensures the found version is recent enough

### Fixed

• ortho's eqEndSeg incorrectly modifies its arguments
• Autotools enables -Wtrampolines and -Wlogical-op for Clang
• node_distinct_coloring failure due to out-of-memory now reported correctly instead of referring to a failure to open lab_gamut
• Fix a typo GD_LIBS to GDLIB_LIBS in tclpkg/tcldot/Makefile.am !2022
• Autotools build system sets libgd variables now instead of incorrectly setting GTK variables
• HTML strings used as labels are distinguishable in GXL output by kind="HTML-like string"
• a Bashism removed from the Autotools build system
• when Criterion is available, the command_line test binary is no longer built and installed by default, but rather during make check
• round-tripping a file through gv2gxl and then gxl2gv no longer causes HTML-like labels to become non-HTML like labels
• fix ODR violation by including the ortho object files in the gvc lib also for CMake and MSbuild

[Bruce Dubbs]

Fixed at commit 907ece52cef5545587a9d9fab1cf4d048504d607

Package updates.
    Update to freetype-2.11.0.
    Update to gparted-1.3.1.
    Update to nghttp2-1.44.0.
    Update to graphviz-2.48.0.

[Bruce Dubbs]

Milestone renamed