Bump mysql-connector-java in /springbt_uid_generator/uid-generator

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 5.1.18 to 8.0.16.
- [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/compare/5.1.18...8.0.16)
Signed-off-by: Ndependabot[bot] <support@github.com>

springbt_uid_generator/uid-generator/pom.xml

@@ -103,7 +103,7 @@
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
-            <version>5.1.18</version>
+            <version>8.0.16</version>
             <scope>test</scope>
         </dependency>