[mifos/head] 0f9b8c: Bump xstream from 1.3.1 to 1.4.18

[dependabot[bot] <no...@gi...>]

  Branch: refs/heads/dependabot/maven/com.thoughtworks.xstream-xstream-1.4.18
  Home:   https://github.com/mifos/head
  Commit: 0f9b8cbe6ac8a4a0aafe6f68316919b5f749096e
      https://github.com/mifos/head/commit/0f9b8cbe6ac8a4a0aafe6f68316919b5f749096e
  Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
  Date:   2021-08-25 (Wed, 25 Aug 2021)

  Changed paths:
    M pom.xml

  Log Message:
  -----------
  Bump xstream from 1.3.1 to 1.4.18

Bumps [xstream](https://github.com/x-stream/xstream) from 1.3.1 to 1.4.18.
- [Release notes](https://github.com/x-stream/xstream/releases)
- [Commits](https://github.com/x-stream/xstream/commits)

---
updated-dependencies:
- dependency-name: com.thoughtworks.xstream:xstream
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <su...@gi...>