Log Message:
(graphics/R-Cairo) Updated 1.15.2 to 1.6.0

NEWS/Changelog

1.6-0	(2022-07-05)
    o	Added text drawing using Harfbuzz and ICU. This significantly
	improves the quality of text rendeded by Cairo and enables
	support for right-to-left and bi-directional text. (#23)
	It also enables the use of ligatures. (#18)
	This feature is only enabled if `pkg-config` is present and
	knows how to use the `harfbuzz-icu` module.

    o	The `family=` argument in text drawing is now honored also for
	FreeType and Harfbuzz back-ends.

    o	configure gains two arguments: `--with-freetype` and
	`--with-harfbuzz`. They both default to `auto` which means
	FreeType and Harfbuzz will be used if present. If set to `yes`
	then the support is required. If set to `no` (or the
	`--without` form is used) then the corresponding support is
	explicitly disabled. Note that Harfbuzz requires FreeType.

    o	added `--enable-debug` argument to configure which will make
	Cairo extremely chatty on the console.

    o	By default `cairo-ft` will be ignored on Windows, becasue it
	it does not work without associated FontConfig configuration
	files and font cache. (#37)
	This behavior can be changed by using `-DUSE_CAIRO_FT=1` to
	force the use of `cairo-ft` unconditionally.

    o	Cairo.capabilities() now also reports two capabilities
	which are not format-related: "freetype" and "harfbuzz". The
	former indicates whether `cairo-ft` is used and the later
	indicates whether the newly introduced Harfbuzz + ICU
	bi-directional rendering support is present.

1.5-15	(2022-03-16)
    o	CairoX11 (xlib back-end): install an X11 I/O error handler
	while processing events such that broken connections are
	detected and don't kill R.

    o	added the option to license under GPL v3. All original
	authors explicitly agreed and included code based on R is
	licensed under GPL-2+ allowing this.

1.5-14	(2021-12-21)
    o	update configure/autoconf, some dependencies such as libtiff
	are now also detected using pkg-config. Tests are now correctly
	using CPPFLAGS from R.

    o	add entry points for GE version 13 (needed for R 4.1.0)
	Note that this is just a port of CRAN NMU which was posted as
	version 1.15-12.2 on CRAN, but was not an actual Cairo version.

1.5-13	(2020-04-15)
    o	add support for CairoFont(usePUA=FALSE) to support regular
	fonts without Adobe Symbol Encoding as symbol fonts in
	R 4.0.0 and higher. Setting usePUA=FALSE in older versions of
	R will issue a warning.