build: bump reactor-core from 3.4.5 to 3.4.6

[dependabot]

Bumps reactor-core from 3.4.5 to 3.4.6.

Release notes

Sourced from reactor-core's releases.

v3.4.6

Reactor-Core 3.4.6 is part of 2020.0.7 Release Train (Europium SR7).

This service release contains bugfixes and new features.

All changes from 3.3.17.RELEASE are also included and these are listed below with an additional level of indentation.

⚠️ Update considerations and deprecations

• MonoDelay doesn't produce a OverflowException backpressure error when the delay is so small that it terminates before regular request had a chance to be made (since the operator assume subscribe == request, like a lot of Monos).
  • instead, it will now onNext+onComplete immediately upon first request
  • The old behavior of failing early is probably counterintuitive to most people, but in case someone relies on it it can be opted back in by using an undocumented Context key, reactor.core.publisher.MonoDelay.failOnBackpressure with value true. 

✨ New features and improvements

• Add LIFTER Scannable attribute (#2669)
• Polish FluxRetry error message when times < 0 (#2694)
• Avoid backpressure error with tiny MonoDelay/emit on 1st request (#2686)
• from 3.3.x:
  • Add StepVerifierOptions.copy(), withVirtualTime uses default vts (#2688)
  • Polish corner cases in FluxLimitRequest, complete fast on cap=0 (#2699, 29d2e3b68)

🪲 Bug fixes

• Prevent infinite recursion of MonoMaterialize#request (#2676)
• Improve switchOnFirst race-safety by using single volatile state (#2671)
• Synchronize SinkManyBestEffort add/remove/termination (#2695)
• [reactor-test] ColdTestPublisher now increments subscriberCount before completing (#2700)
• from 3.3.x:
  • GroupBy request 1 more group when last active group is cancelled (#2681)
  • Always terminate new subscribers when ColdTestPublisher is done (#2697)

📖 Documentation, Tests and Build

• Use contextWrite(f) rather than subscriberContext(f) in docs (#2685)
• from 3.3.x:
  • Renamed default branch to main, update CI (#2679)
  • [polish] Set main class earlier in buildSrc/JmhExecTask (174afcc0e)
  • Make MonoCollectTest logs less verbose, remove discard fail logs (#2687)

👍 Thanks to the following contributors that also participated to this release

@​horizonzy, @​robotmrv, @​vovikdrg

Commits

• 4d1613e [release] Prepare and release 3.4.6
• d580ee5 Merge-ignore release 3.3.17 (back to snapshots) into main
• 63ff02a [release] Next development version 3.3.18.BUILD-SNAPSHOT
• b6f7fde Merge 7d5ab0818 and ignore release 3.3.17 into 3.4.6
• 7d5ab08 [build] Fix tagging step, using job's output
• d1138d8 [release] Prepare and release 3.3.17.RELEASE
• 42b7ce9 Merge b65019c32 into 3.4.6
• b65019c [build] Move the tagging step last
• dedac83 Add take(int, boolean), prep for new default behavior in 3.5 (#2691)
• f383f4d Merge 29d2e3b68 into 3.4.6
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)