[sushi: 1/2] workaround for having both gtksourceview 3 and 4 installed. Fixes #12.

[Cosimo Cecchi <cosimoc src gnome org>]

commit 8b2ec7f5e6ad39e04aa9bd562022d66163f50d19
Author: Joel Ong <joel ong yale edu>
Date:   Mon Apr 1 14:26:02 2019 -0400

    workaround for having both gtksourceview 3 and 4 installed. Fixes #12.

 src/js/viewers/text.js | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/js/viewers/text.js b/src/js/viewers/text.js
index 86a53b7..9566adb 100644
--- a/src/js/viewers/text.js
+++ b/src/js/viewers/text.js
@@ -23,6 +23,8 @@
  *
  */
 
+imports.gi.versions.GtkSource = '3.0';
+
 const Gdk = imports.gi.Gdk;
 const GtkClutter = imports.gi.GtkClutter;
 const Gtk = imports.gi.Gtk;