fix(deps): update dependency io.netty:netty-handler to v4.2.6.final

Author: renovate[bot]

pom.xml

@@ -58,7 +58,7 @@
     <!-- when changing version also update version in LICENSE_binary  -->
     <hdrhistogram.version>2.2.2</hdrhistogram.version>
     <metrics.version>4.2.37</metrics.version>
-    <netty.version>4.1.127.Final</netty.version>
+    <netty.version>4.2.6.Final</netty.version>
     <esri.version>1.2.1</esri.version>
     <!--
     When upgrading TinkerPop please upgrade the version matrix in