chore(deps): update dependency com.google.auth:google-auth-library-oauth2-http to v1.6.0 (#780)
chore(deps): update dependency com.google.auth:google-auth-library-oauth2-http to v1.6.0 (#780)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.auth:google-auth-library-oauth2-http](https://togithub.com/googleapis/google-auth-library-java) | `1.5.3` -> `1.6.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.6.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.6.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.6.0/compatibility-slim/1.5.3)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.6.0/confidence-slim/1.5.3)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/google-auth-library-java</summary>

### [`v1.6.0`](https://togithub.com/googleapis/google-auth-library-java/blob/HEAD/CHANGELOG.md#&#8203;160-httpsgithubcomgoogleapisgoogle-auth-library-javacomparev153v160-2022-03-15)

[Compare Source](https://togithub.com/googleapis/google-auth-library-java/compare/v1.5.3...v1.6.0)

##### Features

-   Add AWS Session Token to Metadata Requests ([#&#8203;850](https://togithub.com/googleapis/google-auth-library-java/issues/850)) ([577e9a5](https://togithub.com/googleapis/google-auth-library-java/commit/577e9a52204b0d6026a302bb7efe2c6162d57945))

##### Bug Fixes

-   ImmutableSet converted to List for Impersonated Credentials ([#&#8203;732](https://togithub.com/googleapis/google-auth-library-java/issues/732)) ([7dcd549](https://togithub.com/googleapis/google-auth-library-java/commit/7dcd549c4ef0617e657315b7a718368fbd162997))
-   update library docs ([#&#8203;868](https://togithub.com/googleapis/google-auth-library-java/issues/868)) ([a081015](https://togithub.com/googleapis/google-auth-library-java/commit/a081015cb72ade91c022b58261c8d253e46a7793))

##### [1.5.3](https://togithub.com/googleapis/google-auth-library-java/compare/v1.5.2...v1.5.3) (2022-02-24)

##### Bug Fixes

-   **ci:** downgrade nexus-staging-maven-plugin to 1.6.8 ([#&#8203;874](https://togithub.com/googleapis/google-auth-library-java/issues/874)) ([fc331d4](https://togithub.com/googleapis/google-auth-library-java/commit/fc331d466286d99cb3c6aa8977d34fd5f224eff7))

##### [1.5.2](https://togithub.com/googleapis/google-auth-library-java/compare/v1.5.1...v1.5.2) (2022-02-24)

##### Bug Fixes

-   downgrading nexus staging plugin 1.6.8 ([#&#8203;871](https://togithub.com/googleapis/google-auth-library-java/issues/871)) ([e87224c](https://togithub.com/googleapis/google-auth-library-java/commit/e87224cca10d5d24523a5c3ac1e829fd51089f0c))

##### [1.5.1](https://togithub.com/googleapis/google-auth-library-java/compare/v1.5.0...v1.5.1) (2022-02-22)

##### Bug Fixes

-   **deps:** update dependency org.apache.maven.plugins:maven-javadoc-plugin to v3.3.2 ([#&#8203;852](https://togithub.com/googleapis/google-auth-library-java/issues/852)) ([aa557c7](https://togithub.com/googleapis/google-auth-library-java/commit/aa557c7545941d712339b4b62a413997a54bcccc))

</details>

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