play-json 2.7.1 (#308)
play-json 2.7.1 (#308)

# Pull Request Checklist

* [x] Have you read through the [contributor guidelines](https://www.playframework.com/contributing)?
* [x] Have you signed the [Typesafe CLA](https://www.typesafe.com/contribute/cla)?
* [x] Have you [squashed your commits](https://www.playframework.com/documentation/latest/WorkingWithGit#Squashing-commits)?
* [ ] Have you added copyright headers to new files?
* [ ] Have you checked that both Scala and Java APIs are updated?
* [ ] Have you updated the documentation for both Scala and Java sections?
* [ ] Have you added tests for any changed functionality?

## Fixes

Fixes #xxxx

## Purpose

What does this PR do?

## Background Context

Why did you take this approach?

## References

Are there any relevant issues / PRs / mailing lists discussions?

playframework/play-ws