Bump netty4.version from 4.1.115.Final to 4.2.1.Final

Bumps `netty4.version` from 4.1.115.Final to 4.2.1.Final.

Updates `io.netty:netty-all` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-handler` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-common` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-resolver` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-codec` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-transport` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-buffer` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-transport-native-epoll` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

Updates `io.netty:netty-transport-native-unix-common` from 4.1.115.Final to 4.2.1.Final
- [Commits](netty/netty@netty-4.1.115.Final...netty-4.2.1.Final)

---
updated-dependencies:
- dependency-name: io.netty:netty-all
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-handler
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-common
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-resolver
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-codec
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-transport
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-buffer
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-transport-native-epoll
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.netty:netty-transport-native-unix-common
  dependency-version: 4.2.1.Final
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -78,7 +78,7 @@
         <commons.beanutils.version>1.9.4</commons.beanutils.version>
         <commons.collections.version>3.2.2</commons.collections.version>
         <zookeeper.version>3.9.2</zookeeper.version>
-        <netty4.version>4.1.115.Final</netty4.version>
+        <netty4.version>4.2.1.Final</netty4.version>
         <jna.version>5.14.0</jna.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>