[gtksourceview] tag: mark as available since 3.20

[Sébastien Wilmet <swilmet src gnome org>]

commit fe5865dfad82f895e616eddac17111afa35f76dc
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Dec 19 19:32:45 2015 +0100

    tag: mark as available since 3.20

 gtksourceview/gtksourcetag.c |    1 +
 gtksourceview/gtksourcetag.h |    2 +-
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gtksourceview/gtksourcetag.c b/gtksourceview/gtksourcetag.c
index d6217ae..17080c9 100644
--- a/gtksourceview/gtksourcetag.c
+++ b/gtksourceview/gtksourcetag.c
@@ -172,6 +172,7 @@ gtk_source_tag_init (GtkSourceTag *tag)
  * use.
  *
  * Returns: a new #GtkSourceTag.
+ * Since: 3.20
  */
 GtkTextTag *
 gtk_source_tag_new (const gchar *name)
diff --git a/gtksourceview/gtksourcetag.h b/gtksourceview/gtksourcetag.h
index 725f98a..c53c246 100644
--- a/gtksourceview/gtksourcetag.h
+++ b/gtksourceview/gtksourcetag.h
@@ -41,7 +41,7 @@ struct _GtkSourceTagClass
        gpointer padding[10];
 };
 
-GTK_SOURCE_AVAILABLE_IN_ALL
+GTK_SOURCE_AVAILABLE_IN_3_20
 GtkTextTag *   gtk_source_tag_new              (const gchar *name);
 
 G_END_DECLS