Bump Netty from 4.1.60.Final to 4.1.73.Final

Fixes #436

Author: aheritier

pom.xml

@@ -102,6 +102,13 @@
         <type>pom</type>
         <scope>import</scope>
       </dependency>
+      <dependency>
+        <groupId>io.netty</groupId>
+        <artifactId>netty-bom</artifactId>
+        <version>4.1.73.Final</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>      
     </dependencies>
   </dependencyManagement>