[gnome-calendar] build: require libical >= 1.0 for a working icaltime_days_in_year()

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 241198c7a46590861e2c647c8392faf500a5ac39
Author: Alexandre Rostovtsev <tetromino gentoo org>
Date:   Fri Jun 19 23:06:41 2015 -0400

    build: require libical >= 1.0 for a working icaltime_days_in_year()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=751244

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 6b01da7..3ebdc58 100644
--- a/configure.ac
+++ b/configure.ac
@@ -86,7 +86,7 @@ GTK_MIN_VERSION=3.15.4
 ECAL_REQUIRED=3.13.90
 EDATASERVER_REQUIRED=3.17.1
 EDATASERVERUI_REQUIRED=3.17.1
-LIBICAL_REQUIRED=0.43
+LIBICAL_REQUIRED=1.0
 GOA_MIN_VERSION=3.2.0
 
 PKG_CHECK_MODULES(CALENDAR,