Bump postgresql from 42.2.15 to 42.2.16

Bumps [postgresql](https://github.com/pgjdbc/pgjdbc) from 42.2.15 to 42.2.16.
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.2.15...REL42.2.16)

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

Author: dependabot[bot]

pom.xml

@@ -129,7 +129,7 @@
         <dependency>
             <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>
-            <version>42.2.15</version>
+            <version>42.2.16</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
         <dependency>