Bump commons-io:commons-io from 2.20.0 to 2.21.0 (closes #166)

Bumps [commons-io:commons-io](https://github.com/apache/commons-io) from 2.20.0 to 2.21.0.
- [Changelog](https://github.com/apache/commons-io/blob/master/RELEASE-NOTES.txt)
- [Commits](https://github.com/apache/commons-io/compare/rel/commons-io-2.20.0...rel/commons-io-2.21.0)

Change-Id: I10924bf6cce9949bc5be01debf63470a198d0e80

---
updated-dependencies:
- dependency-name: commons-io:commons-io
  dependency-version: 2.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Change-Id: I1993d350a7c777752fde521ffd271b2aefaffa4f
diff --git a/pom.xml b/pom.xml
index 5cd0b37..f2459c2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -101,7 +101,7 @@
     <dependency>
       <groupId>commons-io</groupId>
       <artifactId>commons-io</artifactId>
-      <version>2.20.0</version>
+      <version>2.21.0</version>
     </dependency>
 
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