[libgit2-glib] Bump libgit2 requirement to 0.20.0

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 97b6e2823d4dc08a5261e1f9e1d319f5ca4e5ce2
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Fri Jan 10 00:08:31 2014 +0100

    Bump libgit2 requirement to 0.20.0

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index b4e4f00..6e4c7e8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -56,7 +56,7 @@ GTK_DOC_CHECK([1.11], [--flavour=no-tmpl])
 
 INTROSPECTION_REQUIRED=0.10.1
 GLIB_REQUIRED=2.28.0
-GIT2_REQUIRED=0.19.0
+GIT2_REQUIRED=0.20.0
 
 PKG_CHECK_MODULES(LIBGIT2_GLIB, [
        gobject-2.0 >= $GLIB_REQUIRED