Bump org.postgresql:postgresql from 42.7.7 to 42.7.8 (#846)

Bumps [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc) from 42.7.7 to 42.7.8.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.7.7...REL42.7.8)

---
updated-dependencies:
- dependency-name: org.postgresql:postgresql
  dependency-version: 42.7.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -107,7 +107,7 @@
     <play2-json.version>3.0.5</play2-json.version>
     <play2-ebean.version>8.3.0</play2-ebean.version>
     <play2-jdbc-evolutions.version>3.0.9</play2-jdbc-evolutions.version>
-    <postgresql.version>42.7.7</postgresql.version>
+    <postgresql.version>42.7.8</postgresql.version>
     <scala.version>2.13.12</scala.version>
     <scala.xml.version>2.4.0</scala.xml.version>
     <simplejavamail.version>8.12.6</simplejavamail.version>