[gtksourceview/gtksourceview-5-4] NEWS: update release notes for 5.4.2

[Christian Hergert <chergert src gnome org>]

commit f76854b62d3d4af3f45ed5a63e6ae0950639f2f4
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jun 12 10:42:37 2022 -0700

    NEWS: update release notes for 5.4.2

 NEWS | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
---
diff --git a/NEWS b/NEWS
index 0cdfaccc..7eb34481 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,40 @@
+News in 5.4.2, 2022-06-12
+-------------------------
+
+ * Updated languages: c.lang, perl.lang
+ * Updated style-schemes: Adwaita-dark, solarized-light, solarized-dark
+ * Updated translations: Friulian
+ * Gutter renderers are now provided a prelight quark for lines when the
+   pointer is over the gutter.
+ * Hover assistants now avoid synthesized motion which is used much more
+   often in GTK 4 when dealing with crossing-events.
+ * Hover assistants will now dismiss themselves when the cursor moves.
+ * GtkSourceMap has reduced how often it needs to do allocation by ignoring
+   spurious notify::upper and value-changed signals from GtkTextView's
+   vertical GtkAdjustment.
+ * The testsuite has gained some correctness improvements thanks to
+   issues pointed out by Sébastien Wilmet.
+ * The Vim emulation's register implementation is now shared between buffers
+   as it would be expected in Vim.
+ * Snippets have gained some robustness improvements including the ability
+   to simplify results from the snippet parser, more defensive behavior,
+   and being lazier when possible.
+ * Tabbing through focus-positions in snippets will now immediately jump
+   to the new position if scrolling is required instead of animating as
+   it results in better placement of tooltip assistants.
+ * Assistants including completion, hover, and interactive tooltips now
+   reduce how often they request presentation and position calculation from
+   GDK and ultimately display servers such as Wayland.
+ * Completion windows now take the size of the gutter into account when
+   calculating their position relative to the parent GtkWindow so that the
+   typed-text column remains aligned with typed text in the source view.
+ * Completion has gained robustness improvements to do less work when
+   possible and avoid spinning the frame-clock which could happen in
+   certain scenarios.
+
+It is recommended that distributions update to this release if they are
+already shipping a GtkSourceView 5.4.x release.
+
 News in 5.4.1, 2022-04-21
 -------------------------