Sync version numbering with CRAN release of v0.5.6

Change-Id: Id45d89043d3c56181b5039b28caa8967405bd55e
diff --git a/DESCRIPTION b/DESCRIPTION
index 29c3893..ece79c7 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: RKorAPClient
 Type: Package
 Title: 'KorAP' Web Service Client Package
-Version: 0.5.5.9002
+Version: 0.5.6.9002
 Authors@R:
     c(person(given = "Marc",
              family = "Kupietz",