diff -uNr a/.tarball-version b/.tarball-version
--- a/.tarball-version	1970-01-01 01:00:00.000000000 +0100
+++ b/.tarball-version	2018-08-20 10:42:03.876068353 +0200
@@ -0,0 +1 @@
+4.2.1
diff -uNr a/.version b/.version
--- a/.version	1970-01-01 01:00:00.000000000 +0100
+++ b/.version	2018-08-20 10:52:35.712060731 +0200
@@ -0,0 +1 @@
+4.2.1