[gtksourceview] build: bump development version

[Christian Hergert <chergert src gnome org>]

commit fe994de679d2250e3b3d0c252f0d7a556f8434da
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jul 20 10:26:36 2020 -0700

    build: bump development version
    
    This should have been done when branching for 4.6. There is no anticipation
    of a 4.8 release (as instead we'll be movin to GTK 4). But this at least
    keeps build scripts working which are requiring >= 4.6.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index d30aa68c4..5a8499590 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('gtksourceview', 'c',
-          version: '4.5.1',
+          version: '4.7.1',
           license: 'LGPL-2.1-or-later',
     meson_version: '>= 0.50.0',
   default_options: [ 'c_std=gnu99',