Correctly propagate frontend call warnings (fixes #211)

Change-Id: Ia571b8e6b0ba0a4edbf0501254ce2bc115f18cf6
diff --git a/package.json b/package.json
index 2a83165..500c24a 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "Kalamar",
   "description": "Mojolicious-based Frontend for KorAP",
   "license": "BSD-2-Clause",
-  "version": "0.54.0",
+  "version": "0.55.0",
   "pluginVersion": "0.2.2",
   "engines": {
     "node": ">=6.0.0"