Bump gson from 2.8.9 to 2.9.0 in /test/fixtures/hdfs-fixture (opensea…

…rch-project#2190)

Bumps [gson](https://github.com/google/gson) from 2.8.9 to 2.9.0.
- [Release notes](https://github.com/google/gson/releases)
- [Changelog](https://github.com/google/gson/blob/master/CHANGELOG.md)
- [Commits](google/gson@gson-parent-2.8.9...gson-parent-2.9.0)

---
updated-dependencies:
- dependency-name: com.google.code.gson:gson
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

test/fixtures/hdfs-fixture/build.gradle

@@ -38,7 +38,7 @@ dependencies {
   api "commons-codec:commons-codec:${versions.commonscodec}"
   api "org.apache.logging.log4j:log4j-core:${versions.log4j}"
   api "io.netty:netty-all:${versions.netty}"
-  api 'com.google.code.gson:gson:2.8.9'
+  api 'com.google.code.gson:gson:2.9.0'
   api "org.bouncycastle:bcpkix-jdk15on:${versions.bouncycastle}"
   api "com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:${versions.jackson}"
   api "com.fasterxml.jackson.core:jackson-databind:${versions.jackson}"