Bump commons-io from 2.6 to 2.7 in /Demos/Dropwizard

Bumps commons-io from 2.6 to 2.7.

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

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

Author: dependabot[bot]

Demos/Dropwizard/pom.xml

@@ -72,7 +72,7 @@
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
-            <version>2.6</version>
+            <version>2.7</version>
         </dependency>
         <dependency>
             <groupId>com.groupdocs</groupId>