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Bump httpclient from 4.5.12 to 4.5.13 in /parent

Bumps httpclient from 4.5.12 to 4.5.13.

---
updated-dependencies:
- dependency-name: org.apache.httpcomponents:httpclient
  dependency-type: direct:production
...

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