devel/pangomm2.48: import pangomm2.48-2.48.1

pangomm (used to be part of gtkmm) is the official C++ interface for the
popular GUI library GTK+. Highlights include typesafe callbacks, widgets
extensible via inheritance and a comprehensive set of widget classes that
can be freely combined to quickly create complex user interfaces.

This package follows the 2.48 API.

Changes compared to pangomm:

2.48.1 (stable):

* GlyphItem: Fix a memory leak in split()
  (Kjell Ahlstedt)
* Layout: Speed up get_log_attrs()
  (Kjell Ahlstedt)

Build:
* Meson build: Use relative paths to untracked/
  (Kjell Ahlstedt) Merge request gtkmm!61 (Mingli Yu)
* pangommconfig.h.*: Don't dllimport on MinGW
  (Chun-wei Fan) Issue gtkmm#90 (Lukas K.)
* Meson build: Make it possible to use pangomm as a subproject
  (Kjell Ahlstedt)
* Meson build: No implicit_include_directories
  (Kjell Ahlstedt)

2.48.0 (stable):
This is the first stable release in the pangomm-2.48 ABI series.
It is parallel-installable with the pangomm-1.4 ABI.

The tarball for 2.48.0 has been created with 'meson dist'.
If you build with Autotools from the tarball, please read the relevant
part of the README file.

* FontFamily, FontMap: Implement the Gio::ListModel interface
  CairoFontMap: Add get_default()
  (Andreas Persson) Merge request !20
* Attribute: Add Overline and ShowFlags enums and some create*() methods
  Renderer: Add vfuncs
  (Kjell Ahlstedt) Issue #9 (misos1)
* Font, FontFace, FontFamily, FontMetrics: Add new methods
  (Kjell Ahlstedt)
* LayoutRun: Rename to GlyphItem
  (Kjell Ahlstedt)
* LayoutIter: Fix get_run() and get_line()
  (Kjell Ahlstedt)
* GlyphString, Item: Wrap pango_shape_with_flags()
  (Kjell Ahlstedt) Issue #9 (Tavmjong Bah)
* Layout: Add set/get_line_spacing()
  (Kjell Ahlstedt) Issue #9 (misos1)

Build:
* Depend on giomm (not just glibmm)
  (Andreas Persson) Merge request !20
* Use __declspec(dllexport) when building with Visual Studio
  (Chun-wei Fan) Merge request !15, !16
* Meson build: Avoid some recompilations
  (Kjell Ahlstedt)
* Meson build: Better error message if trying to build with
  maintainer-mode=false when true is necessary
  (Kjell Ahlstedt) Issue #6 (Rasmus Thomsen)
* Meson build: Set default value of the 'warnings' option to 'min'
  (Kjell Ahlstedt)
* Improve NMake support
  (Chun-wei Fan)
* Improve Visual Studio support
  (Chun-wei Fan) Merge request !15, !19
* docs/reference/: Update for Doxygen >= 1.8.16
  (Kjell Ahlstedt)
* Meson build: Fix versioning on macOS
  (Kjell Ahlstedt) Pull request libsigcplusplus#65 (Tom Schoonjans)
* Change the ABI to pangomm-2.48
  (Kjell Ahlstedt)

(wiz)