[vala/staging] Sync NEWS from 0.50

[Rico Tzschichholz <ricotz src gnome org>]

commit fdfa8f34bfaaf40415c7c2adc70d8570620002ff
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Jan 10 17:26:32 2021 +0100

    Sync NEWS from 0.50

 NEWS | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
---
diff --git a/NEWS b/NEWS
index ba104c571..d4aa35c84 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,30 @@
+Vala 0.50.3
+===========
+ * Various improvements and bug fixes:
+  - codegen:
+    + Use CCodeInvalidExpression instead of place holders
+    + Don't leak memory of already assigned out-parameter on error [#1123]
+    + Don't leak memory on internal value comparison of property setter
+    + Fix assignment of casted struct value to property [#1126]
+  - vala:
+    + Report an error if gio-2.0 is missing for DBus support
+    + Add missing TraverseVisitor.visit_addressof_expression()
+    + value_type of PointerIndirection expressions must not be owned [#1118]
+    + SliceExpression need to return heap-allocated or unowned references [#1120]
+    + Accept "unowned var" as type for foreach variable declaration [#152]
+    + Ownership transfer of inline-allocated array is not allowed [#931]
+  - tests: Use Automake’s parallel test driver to speed up running tests [#1094]
+  - testrunner: A lot of simplifications
+
+ * Bindings:
+  - gio-2.0: Fix DBusSubtreeIntrospectFunc binding
+  - gstreamer-1.0: Fix direction of GLib.Value typed parameters [#1014]
+  - gstreamer: Update from 1.19.0+ git master
+  - gtk4: Use correct cheader_include for wayland/x11 gdk backend [#1112]
+  - gtk4: Don't rename binding for gtk_css_provider_load_from_data [#1117]
+  - gtk4: Update to 4.0.1
+  - webkit2gtk-4.0: Update to 2.30.3
+
 Vala 0.50.2
 ===========
  * Various improvements and bug fixes: