Bump postgresql from 42.2.14 to 42.2.15

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.2.14 to 42.2.15.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.2.14...REL42.2.15)

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

Author: dependabot[bot]

pom.xml

@@ -243,7 +243,7 @@
     <dependency>
       <groupId>org.postgresql</groupId>
       <artifactId>postgresql</artifactId>
-      <version>42.2.14</version>
+      <version>42.2.15</version>
       <scope>test</scope>
     </dependency>
     <dependency>