Bump gson from 2.8.2 to 2.8.9

Bumps [gson](https://github.com/google/gson) from 2.8.2 to 2.8.9.
- [Release notes](https://github.com/google/gson/releases)
- [Changelog](https://github.com/google/gson/blob/master/CHANGELOG.md)
- [Commits](google/gson@gson-parent-2.8.2...gson-parent-2.8.9)

---
updated-dependencies:
- dependency-name: com.google.code.gson:gson
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pom.xml

@@ -36,7 +36,7 @@
         <mybatis-plus.version>3.3.2</mybatis-plus.version>
         <commons-lang3.version>3.12.0</commons-lang3.version>
         <commons-pool2.version>2.11.1</commons-pool2.version>
-        <gson.version>2.8.2</gson.version>
+        <gson.version>2.8.9</gson.version>
         <rocketmq-spring-boot-starter.version>2.1.1</rocketmq-spring-boot-starter.version>
         <seata.version>1.4.0</seata.version>
         <fst.version>2.57</fst.version>