Update dependency io.projectreactor:reactor-core to v3.4.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.projectreactor:reactor-core	3.4.7 -> 3.4.8

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Release Notes

reactor/reactor-core

v3.4.8

Compare Source

Reactor-Core 3.4.8 is part of 2020.0.9 Release Train (Europium SR9).

This service release contains bugfixes and new features.

⚠️ Update considerations and deprecations

• Flux#mergeOrdered has been deprecated (#​2719)
  • this is because unlike other merge operators it would default to delaying errors
  • instead, mergeComparing has been introduced as an alternative that is more consistent with other merge operators

✨ New features and improvements

• Add mergeComparing as fail-fast alternative to mergeOrdered (complemented with a delayError variant) (#​2719)
• Add Mono.cacheInvalidateIf and Mono.cacheInvalidateWhen (#​2717)
  • these two new flavors of caching allow to invalidate the value inside the cache by respectively applying a Predicate on the value when a late subscriber comes in or by associating the cached value with a Mono<Void> invalidation trigger that can be externally completed

🪲 Bug fixes

• Have groupBy replenish prefetch amount when last inner cancels (#​2737)

📖 Documentation, Tests and Build

• [build] Parallelize slow tests in release workflow (2da73e9)
• [chores] The copyright headers have been updated, finally taking the Pivotal acquisition by VMware into account (#​2722, #​2725, #​2729, #​2732, #​2734)
• [polish] Tag 3min worth of tests as 'slow' (#​2738)

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

@​koldat

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Configuration

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🚦 Automerge: Enabled.

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Black Duck Security Report

Merging #3136 into master will increase security risk!

Added Components

Medium Risk: 1
Clean: 149

Removed Components

Clean: 106

Click here to see full report