Update play-json to 2.10.0-RC9

[scala-steward]

About this PR

📦 Updates com.typesafe.play:play-json from 2.10.0-RC7 to 2.10.0-RC9

📜 GitHub Release Notes - Version Diff

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⚙ Adjust future updates

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updates.ignore = [ { groupId = "com.typesafe.play", artifactId = "play-json" } ]

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dependencyOverrides = [{
  pullRequests = { frequency = "30 days" },
  dependency = { groupId = "com.typesafe.play", artifactId = "play-json" }
}]

^{labels: library-update, early-semver-pre-release, semver-spec-pre-release, commit-count:1}

[ybasket]

Play! JSON dropped Java 8, requiring 11+, hence we fail to compile. Unsure what's the best way forward here, dropping Java 8 for fs2-data as a whole, dropping it for Play! JSON integration, dropping the integration itself.

[scala-steward]

Superseded by #525.