Bump postgresql from 42.2.17 to 42.2.18 (#7027)
Bump postgresql from 42.2.17 to 42.2.18 (#7027)

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.2.17 to 42.2.18.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/REL42.2.18/CHANGELOG.md)
- [Commits](https://github.com/pgjdbc/pgjdbc/compare/REL42.2.17...REL42.2.18)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
sauliusg/jabref,JabRef/jabref,JabRef/jabref,sauliusg/jabref,JabRef/jabref,sauliusg/jabref,JabRef/jabref,Siedlerchr/jabref,Siedlerchr/jabref,Siedlerchr/jabref,sauliusg/jabref,Siedlerchr/jabref