Log Message:
pangomm: updated to 2.42.1

2.42.1 (stable):

* Coverage: Ignore deprecations of pango functions
  (so it can be used with the latest versions of pango)
* Layout::get_lines(): Fix ownership of the GSList
* pango/src/color.hg: Fix call to _CLASS_BOXEDTYPE_STATIC

Build:
* tools/gen_scripts: Update for non-source-dir builds
* Add support for building pangomm with Meson
* meson.build: Check if .git is a directory or file
* NMake Makefiles: Allow builds from a GIT checkout
* The fixed call to _CLASS_BOXEDTYPE_STATIC in color.hg
  is necessary in order to use glibmm 2.64.0 or later,
  combined with maintainer-mode in pangomm.