Update some dependencies.
Update some dependencies.

- Bump mockito-core from 3.7.0 to 3.8.0 #91.
- Bump actions/cache from v2 to v2.1.4 #90
- Bump maven-checkstyle-plugin from 3.1.1 to 3.1.2 #88
- Bump junit-jupiter from 5.7.0 to 5.7.1 #89

apache/commons-dbcp,apache/commons-dbcp,apache/commons-dbcp