Update gtksourceview3 to 3.24.3

News in 3.24.3
--------------
* Improvements to the syntax highlighting of: SPARQL, CSS, BibTeX and LaTeX.

News in 3.24.2
--------------
* Avoid type redefinitions.
* jade.lang: add *.pug to globs.
* Bug fix in LaTeX syntax highlighting.
* Various other small bug fixes.
* Translation updates.

News in 3.24.1
--------------
* Deprecate the 'copy' parameter of the GtkSourceView::move-lines signal.
* Force visual word movements for RTL text with Ctrl+left/right.
* Misc bug fixes.
* Translation update.

News in 3.24.0
--------------
* Translation update

News in 3.23.91
---------------
* Improvements to the Visual Studio builds and add support for Visual Studio
  2017.
* Bug fix in Rust syntax highlighting
* Add mimetype to python3.lang
* Translation updates

News in 3.23.90
---------------
* Bug fix in GtkSourceGutterRendererPixbuf
* Fixes for bugs found by Coverity
* New syntax highlighting definition file for: Django template
* Improvements to the syntax highlighting of: CSS and JavaScript
* Translation updates

News in 3.23.2
--------------

This version still uses GTK+ 3. A GtkSourceView 3.24 version is planned (still
depending on GTK+ 3), which will be released at the same time as GNOME 3.24 in
  2017.
* Bug fix in Rust syntax highlighting
* Add mimetype to python3.lang
* Translation updates

News in 3.23.90
---------------
* Bug fix in GtkSourceGutterRendererPixbuf
* Fixes for bugs found by Coverity
* New syntax highlighting definition file for: Django template
* Improvements to the syntax highlighting of: CSS and JavaScript
* Translation updates

News in 3.23.2
--------------

This version still uses GTK+ 3. A GtkSourceView 3.24 version is planned (still
depending on GTK+ 3), which will be released at the same time as GNOME 3.24 in
March 2017.

* Docs: add an introduction with the pkg-config name and which GTK+ version is
  used.
* Build fixes on MS Windows.
* New syntax highlighting definition files for: ABNF and HAXE.
* Improvements to the syntax highlighting of: JavaScript, PHP, Meson, CSS, ini
  and Rust.
* Translation updates.

News in 3.23.1
--------------

This version still uses GTK+ 3. A GtkSourceView 3.24 version is planned (still
depending on GTK+ 3), but the release date is not yet determined.

* New class: GtkSourceSpaceDrawer with a matrix property to combine space types
  vs locations. The old white space drawing API has been deprecated.
* gtk_source_search_context_set_settings() has been deprecated, the "settings"
  property will become construct-only.
* GtkSourceCompletionItem: add a new API and deprecate the old constructors.
* GtkSourceGutter: add get_view() and get_window_type() public functions.
* Build system: do not hardcode the API version (currently 3.0) at as many
  places as possible (use a variable instead).
* Bug fixes
* Documentation improvements
* Translation updates


(prlw1)