Bump mysql-connector-java from 5.1.18 to 8.0.16 in /id-spring-boot-starter#21

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dependabot/maven/id-spring-boot-starter/mysql-mysql-connector-java-8.0.16hansonwang99/Spring-Boot-In-Action:dependabot/maven/id-spring-boot-starter/mysql-mysql-connector-java-8.0.16Copy head branch name to clipboard