Bump commons-io from 2.4 to 2.7 in /markbook

Bumps commons-io from 2.4 to 2.7.

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

Signed-off-by: dependabot[bot] <support@github.com>
1 file changed
tree: 6234ec6da063cbebd6607d30eef1b1ed93ccbc46
  1. books/
  2. markbook/
  3. src/
  4. build.xml
  5. pom.xml