Merge pull request #2009 from mybatis/dependabot/maven/org.postgresql-postgresql-42.2.15

Bump postgresql from 42.2.14 to 42.2.15

Author: hazendaz

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>