[gtksourceview] css.lang: Add "all" property name and "revert" property value

[Christian Hergert <chergert src gnome org>]

commit a41d3e9d580b2ba50c4030831105fa002b004e04
Author: Jeffery To <jeffery to gmail com>
Date:   Tue Jul 23 06:52:42 2019 +0800

    css.lang: Add "all" property name and "revert" property value
    
    https://developer.mozilla.org/en-US/docs/Web/CSS/all
    https://developer.mozilla.org/en-US/docs/Web/CSS/revert

 data/language-specs/css.lang | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/data/language-specs/css.lang b/data/language-specs/css.lang
index 12e598e8..d069269d 100644
--- a/data/language-specs/css.lang
+++ b/data/language-specs/css.lang
@@ -701,6 +701,7 @@
       <keyword>align-content</keyword>
       <keyword>align-items</keyword>
       <keyword>align-self</keyword>
+      <keyword>all</keyword>
       <keyword>animation-delay</keyword>
       <keyword>animation-direction</keyword>
       <keyword>animation-duration</keyword>
@@ -1219,6 +1220,7 @@
       <keyword>proportional-nums</keyword>
       <keyword>proportional-width</keyword>
       <keyword>reverse</keyword>
+      <keyword>revert</keyword>
       <keyword>round</keyword>
       <keyword>row-reverse</keyword>
       <keyword>row</keyword>