[gtksourceview/gtksourceview-4-2] rust.lang: add some newer keywords

[Christian Hergert <chergert src gnome org>]

commit 9ae158708f00f0dd7c127bbecb0a98ad00c05c11
Author: Ricardo Silva Veloso <ricvelozo gmail com>
Date:   Fri Jul 12 04:40:22 2019 +0000

    rust.lang: add some newer keywords

 data/language-specs/rust.lang | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/data/language-specs/rust.lang b/data/language-specs/rust.lang
index fbe6e703..832bb532 100644
--- a/data/language-specs/rust.lang
+++ b/data/language-specs/rust.lang
@@ -68,12 +68,15 @@ except according to those terms.
 
     <context id="keywords" style-ref="keyword">
       <keyword>as</keyword>
+      <keyword>async</keyword>
+      <keyword>await</keyword>
       <keyword>box</keyword>
       <keyword>break</keyword>
       <keyword>const</keyword>
       <keyword>continue</keyword>
       <keyword>crate</keyword>
       <keyword>default</keyword>
+      <keyword>dyn</keyword>
       <keyword>else</keyword>
       <keyword>enum</keyword>
       <keyword>extern</keyword>
@@ -114,6 +117,7 @@ except according to those terms.
       <keyword>proc</keyword>
       <keyword>pure</keyword>
       <keyword>sizeof</keyword>
+      <keyword>try</keyword>
       <keyword>typeof</keyword>
       <keyword>unsized</keyword>
       <keyword>virtual</keyword>