Bump postgresql from 42.5.3 to 42.6.0 (#95)

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.5.3 to 42.6.0.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.5.3...REL42.6.0)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Dejan Kovacevic <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -106,7 +106,7 @@
         <dependency>
             <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>
-            <version>42.5.4</version>
+            <version>42.6.0</version>
         </dependency>
         <dependency>
             <groupId>org.flywaydb</groupId>