Update to pysqlite 2.2.0
diff --git a/Modules/_sqlite/connection.h b/Modules/_sqlite/connection.h
index ef03bc4..faae6e4 100644
--- a/Modules/_sqlite/connection.h
+++ b/Modules/_sqlite/connection.h
@@ -69,6 +69,9 @@
      * in connection_dealloc */
     PyObject* function_pinboard;
 
+    /* a dictionary of registered collation name => collation callable mappings */
+    PyObject* collations;
+
     /* Exception objects */
     PyObject* Warning;
     PyObject* Error;