Bump commons-net from 3.0.1 to 3.9.0

Bumps commons-net from 3.0.1 to 3.9.0.

---
updated-dependencies:
- dependency-name: commons-net:commons-net
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 6f811e2..1f80ffb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -165,7 +165,7 @@
     <commons-httpclient.version>3.1</commons-httpclient.version>
     <commons-io.version>2.1</commons-io.version>
     <commons-lang.version>2.6</commons-lang.version>
-    <commons-net.version>3.0.1</commons-net.version>
+    <commons-net.version>3.9.0</commons-net.version>
     <commons-vfs.version>1.0</commons-vfs.version>
     <echo2.version>2.1.1</echo2.version>
     <echo2.extras.version>2.1.0</echo2.extras.version>