Update akka-actor, ... to 2.6.8

[scala-steward]

Updates

• com.typesafe.akka:akka-actor
• com.typesafe.akka:akka-actor-testkit-typed
• com.typesafe.akka:akka-actor-typed
• com.typesafe.akka:akka-cluster
• com.typesafe.akka:akka-cluster-sharding
• com.typesafe.akka:akka-cluster-sharding-typed
• com.typesafe.akka:akka-cluster-tools
• com.typesafe.akka:akka-cluster-typed
• com.typesafe.akka:akka-discovery
• com.typesafe.akka:akka-distributed-data
• com.typesafe.akka:akka-multi-node-testkit
• com.typesafe.akka:akka-persistence
• com.typesafe.akka:akka-persistence-query
• com.typesafe.akka:akka-persistence-typed
• com.typesafe.akka:akka-protobuf-v3
• com.typesafe.akka:akka-remote
• com.typesafe.akka:akka-serialization-jackson
• com.typesafe.akka:akka-slf4j
• com.typesafe.akka:akka-stream
• com.typesafe.akka:akka-stream-testkit
• com.typesafe.akka:akka-testkit

from 2.6.5 to 2.6.7.

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

If you'd like to skip this version, you can just close this PR. If you have any feedback, just mention me in the comments below.

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Ignore future updates

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labels: library-update, semver-patch

[ignasi35]

Lagom releases considerations

This can be merged as soon as master is using Akka 2.6.5. This must be backported to 1.6.x but only after 1.6.3 has been released.

[ignasi35]

SBR-related task list

Akka 2.6.6+ includes SBR. This should be considered when bumping the version:

• review the namespace and values on cluster/core/src/main/resources/play/reference-overrides-conf
• review behavior on JoinClusterImpl wrt self-join VS SBR
• update documentation
  • cluster.md
  • multiple links and mentions to the commercial version

[ignasi35]

With 2.6.8 released, I'm bumping the version in this PR since it already has some improvements.

[ihostage]

Correction of some links

[patriknw]

LGTM

All changes suggested are merged. :-)

[ignasi35]

Did a cleanup of the depdenencies whitelist in preparation for 1.6.4. There's a couple of non-compliances but since we'll need to do another cleanupo before the release we'll fix those then.

[ignasi35]

Did a cleanup of the depdenencies whitelist in preparation for 1.6.4. There's a couple of non-compliances but since we'll need to do another cleanupo before the release we'll fix those then.

When merging from master and fixing some clonficts I took the last few missing non-compliances out of the way.

[ignasi35]

@Mergifyio backport 1.6.x

[mergify]

Command backport 1.6.x: failure

No backport have been created

• Backport to branch 1.6.x failed

Cherry-pick of b685671 has failed:

On branch mergify/bp/1.6.x/pr-2946
Your branch is ahead of 'origin/1.6.x' by 5 commits.
  (use "git push" to publish your local commits)

You are currently cherry-picking commit b685671a3.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)

	both modified:   project/Dependencies.scala

no changes added to commit (use "git add" and/or "git commit -a")