Bump mysql-connector-java in /modules/junit-jupiter

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 8.0.18 to 8.0.19.
- [Release notes](https://github.com/mysql/mysql-connector-j/releases)
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/release/8.0/CHANGES)
- [Commits](https://github.com/mysql/mysql-connector-j/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

modules/junit-jupiter/build.gradle

@@ -14,7 +14,7 @@ dependencies {
     }
 
     testRuntime 'org.postgresql:postgresql:42.2.9'
-    testRuntime 'mysql:mysql-connector-java:8.0.18'
+    testRuntime 'mysql:mysql-connector-java:8.0.19'
     testRuntime 'org.junit.jupiter:junit-jupiter-engine:5.5.2'
 }