changes for opensearch 2.19.0

Author: Swen Thümmler

gradle.properties

@@ -1,8 +1,8 @@
 group = org.xbib.opensearch
 name = opensearch-plugin-bundle
-version = 2.18.0.0
+version = 2.19.0.0
 
-opensearch.version = 2.18.0
+opensearch.version = 2.19.0
 lucene.version = 9.12.1
 
 icu4j.version = 75.1