Bump dnsjava:dnsjava from 2.1.7 to 3.6.0 in /traffic_router/core

Bumps [dnsjava:dnsjava](https://github.com/dnsjava/dnsjava) from 2.1.7 to 3.6.0.
- [Release notes](https://github.com/dnsjava/dnsjava/releases)
- [Changelog](https://github.com/dnsjava/dnsjava/blob/master/Changelog)
- [Commits](https://github.com/dnsjava/dnsjava/compare/v2.1.7...v3.6.0)

---
updated-dependencies:
- dependency-name: dnsjava:dnsjava
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/traffic_router/core/pom.xml b/traffic_router/core/pom.xml
index 9f3afb9..caef37c 100644
--- a/traffic_router/core/pom.xml
+++ b/traffic_router/core/pom.xml
@@ -291,7 +291,7 @@
 		<dependency>
 			<groupId>dnsjava</groupId>
 			<artifactId>dnsjava</artifactId>
-			<version>2.1.7</version>
+			<version>3.6.0</version>
 		</dependency>
 		<dependency>
 			<groupId>com.google.guava</groupId>