Merge pull request #791 from cloudbees-oss/dependabot/maven/io.netty-netty-bom-4.2.9.Final

Bump io.netty:netty-bom from 4.2.7.Final to 4.2.9.Final

Author: PierreBtz

pom.xml

@@ -119,7 +119,7 @@
       <dependency>
         <groupId>io.netty</groupId>
         <artifactId>netty-bom</artifactId>
-        <version>4.2.7.Final</version>
+        <version>4.2.9.Final</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>