Bump com.baomidou:mybatis-plus from 3.5.7 to 3.5.9

Bumps [com.baomidou:mybatis-plus](https://github.com/baomidou/mybatis-plus) from 3.5.7 to 3.5.9.
- [Release notes](https://github.com/baomidou/mybatis-plus/releases)
- [Changelog](https://github.com/baomidou/mybatis-plus/blob/3.0/CHANGELOG.md)
- [Commits](baomidou/mybatis-plus@v3.5.7...v3.5.9)

---
updated-dependencies:
- dependency-name: com.baomidou:mybatis-plus
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

core/pom.xml

@@ -115,7 +115,7 @@
         <dependency>
             <groupId>com.baomidou</groupId>
             <artifactId>mybatis-plus</artifactId>
-            <version>3.5.7</version>
+            <version>3.5.9</version>
             <scope>test</scope>
         </dependency>
         <dependency>