Add Marketplace to Changes

Change-Id: If9a4814308abf5eebed6e26af7949d5bd23e38e2
diff --git a/package.json b/package.json
index 7cdb258..df9018c 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "Kalamar",
   "description": "Mojolicious-based Frontend for KorAP",
   "license": "BSD-2-Clause",
-  "version": "0.51.2",
+  "version": "0.51.3",
   "pluginVersion": "0.2.2",
   "engines": {
     "node": ">=6.0.0"