Merge pull request #2 from io7m/dependabot/maven/develop/org.postgres…

…ql-postgresql-42.7.3

Bump org.postgresql:postgresql from 42.7.1 to 42.7.3

pom.xml

@@ -116,7 +116,7 @@
       <dependency>
         <groupId>org.postgresql</groupId>
         <artifactId>postgresql</artifactId>
-        <version>42.7.1</version>
+        <version>42.7.3</version>
       </dependency>
 
       <!-- Build metadata. -->