Bump mysql-connector-java from 8.0.18 to 8.0.19 in /modules/spock (#2242

)

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/spock/build.gradle

@@ -14,5 +14,5 @@ dependencies {
     testCompile 'org.apache.httpcomponents:httpclient:4.5.10'
 
     testRuntime 'org.postgresql:postgresql:42.2.9'
-    testRuntime 'mysql:mysql-connector-java:8.0.18'
+    testRuntime 'mysql:mysql-connector-java:8.0.19'
 }