Bump gson from 2.8.0 to 2.8.6

Bumps [gson](https://github.com/google/gson) from 2.8.0 to 2.8.6.
- [Release notes](https://github.com/google/gson/releases)
- [Changelog](https://github.com/google/gson/blob/master/CHANGELOG.md)
- [Commits](google/gson@gson-parent-2.8.0...gson-parent-2.8.6)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

kubernetes/pom.xml

@@ -225,7 +225,7 @@
     <swagger-core-version>1.5.22</swagger-core-version>
     <sundrio.version>0.21.0</sundrio.version>
     <okhttp3-version>3.14.3</okhttp3-version>
-    <gson-version>2.8.0</gson-version>
+    <gson-version>2.8.6</gson-version>
     <gsonfire-version>1.8.3</gsonfire-version>
     <jodatime-version>2.9.3</jodatime-version>
     <maven-plugin-version>1.0.0</maven-plugin-version>