Merge pull request #1738 from mybatis/dependabot/maven/org.postgresql-postgresql-42.2.8

Bump postgresql from 42.2.5 to 42.2.8

Author: kazuki43zoo

pom.xml

@@ -249,7 +249,7 @@
     <dependency>
       <groupId>org.postgresql</groupId>
       <artifactId>postgresql</artifactId>
-      <version>42.2.5</version>
+      <version>42.2.8</version>
       <scope>test</scope>
     </dependency>
     <dependency>