deps: update dependency com.google.code.gson:gson to v2.9.0 (#727)

[![WhiteSource Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com) This PR contains the following updates: | Package | Change | Age | Adoption | Passing | Confidence | |---|---|---|---|---|---| | [com.google.code.gson:gson](https://togithub.com/google/gson) | `2.8.9` -> `2.9.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.code.gson:gson/2.9.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.code.gson:gson/2.9.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.code.gson:gson/2.9.0/compatibility-slim/2.8.9)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.code.gson:gson/2.9.0/confidence-slim/2.8.9)](https://docs.renovatebot.com/merge-confidence/) | --- ### Release Notes <details> <summary>google/gson</summary> ### [`v2.9.0`](https://togithub.com/google/gson/blob/HEAD/CHANGELOG.md#Version-290) **The minimum supported Java version changes from 6 to 7.** - Change target Java version to 7 ([#&#8203;2043](https://togithub.com/google/gson/issues/2043)) - Put `module-info.class` into Multi-Release JAR folder ([#&#8203;2013](https://togithub.com/google/gson/issues/2013)) - Improve error message when abstract class cannot be constructed ([#&#8203;1814](https://togithub.com/google/gson/issues/1814)) - Support EnumMap deserialization ([#&#8203;2071](https://togithub.com/google/gson/issues/2071)) - Add LazilyParsedNumber default adapter ([#&#8203;2060](https://togithub.com/google/gson/issues/2060)) - Fix JsonReader.hasNext() returning true at end of document ([#&#8203;2061](https://togithub.com/google/gson/issues/2061)) - Remove Gradle build support. Build script was outdated and not actively maintained anymore ([#&#8203;2063](https://togithub.com/google/gson/issues/2063)) - Add `GsonBuilder.disableJdkUnsafe()` ([#&#8203;1904](https://togithub.com/google/gson/issues/1904)) - Add `UPPER_CASE_WITH_UNDERSCORES` in FieldNamingPolicy ([#&#8203;2024](https://togithub.com/google/gson/issues/2024)) - Fix failing to serialize Collection or Map with inaccessible constructor ([#&#8203;1902](https://togithub.com/google/gson/issues/1902)) - Improve TreeTypeAdapter thread-safety ([#&#8203;1976](https://togithub.com/google/gson/issues/1976)) - Fix `Gson.newJsonWriter` ignoring lenient and HTML-safe setting ([#&#8203;1989](https://togithub.com/google/gson/issues/1989)) - Delete unused LinkedHashTreeMap ([#&#8203;1992](https://togithub.com/google/gson/issues/1992)) - Make default adapters stricter; improve exception messages ([#&#8203;2000](https://togithub.com/google/gson/issues/2000)) - Fix `FieldNamingPolicy.upperCaseFirstLetter` uppercasing non-letter ([#&#8203;2004](https://togithub.com/google/gson/issues/2004)) </details> --- ### Configuration 📅 **Schedule**: At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, click this checkbox. --- This PR has been generated by [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#github/googleapis/java-core).

Author: renovate-bot

pom.xml

@@ -171,7 +171,7 @@
  <threetenbp.version>1.5.2</threetenbp.version>
  <objenesis.version>3.2</objenesis.version>
  <errorprone.version>2.11.0</errorprone.version>
- <gson.version>2.8.9</gson.version>
+ <gson.version>2.9.0</gson.version>
  </properties>
 
  <dependencyManagement>