Bump netty-all from 4.1.35.Final to 4.1.42.Final

Bumps [netty-all](https://github.com/netty/netty) from 4.1.35.Final to 4.1.42.Final.
- [Release notes](https://github.com/netty/netty/releases)
- [Commits](https://github.com/netty/netty/compare/netty-4.1.35.Final...netty-4.1.42.Final)

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index e5a9933..105adcf 100644
--- a/pom.xml
+++ b/pom.xml
@@ -16,7 +16,7 @@
 
 	<properties>
 		<java.version>1.8</java.version>
-		<netty.version>4.1.35.Final</netty.version>
+		<netty.version>4.1.42.Final</netty.version>
 		<slf4j.version>1.7.26</slf4j.version>
 		<log4j.version>1.2.17</log4j.version>
 		<curator.version>2.12.0</curator.version>