Replaced TestNG with JUnit.
Updated SLF4J from 1.7.30 to 1.7.31.
Updated MariaDB from 2.6.2 to 2.7.3.
Updated MySQL from 8.0.21 to 8.0.25.
Updated HikariCP from 3.4.5 to 4.0.3.
Updated DBCP2 from 2.7.0 to 2.8.0.