Prepare release 6.4.0 [skip ci]

CHANGELOG

@@ -1,3 +1,5 @@
+Version 6.4.0 - 2022-05-02
+* Bug fixes (see mercurial logs for details)
 * Prevent to select reconciled payment or group on draft statement line
 * Reconcile payment clearing line with all statement lines
 * Use reference field for statement line relation

COPYRIGHT

@@ -1,5 +1,5 @@
-Copyright (C) 2014-2021 Cédric Krier.
-Copyright (C) 2014-2021 B2CK SPRL.
+Copyright (C) 2014-2022 Cédric Krier.
+Copyright (C) 2014-2022 B2CK SPRL.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

tryton.cfg

@@ -1,5 +1,5 @@
 [tryton]
-version=6.3.0
+version=6.4.0
 depends:
     account_payment
     ir