Bump commons-io from 2.6 to 2.7 in /tests/slim (#421)

Bumps commons-io from 2.6 to 2.7.

---
updated-dependencies:
- dependency-name: commons-io:commons-io
  dependency-type: direct:development
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

tests/slim/pom.xml

@@ -58,7 +58,7 @@
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
-            <version>2.6</version>
+            <version>2.7</version>
             <scope>test</scope>
         </dependency>
         <dependency>