Bump commons-lang from 2.4 to 2.6

Bumps commons-lang from 2.4 to 2.6.

---
updated-dependencies:
- dependency-name: commons-lang:commons-lang
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -212,7 +212,7 @@
     <dependency>
       <groupId>commons-lang</groupId>
       <artifactId>commons-lang</artifactId>
-      <version>2.4</version>
+      <version>2.6</version>
     </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>