Bump io.reactivex.rxjava3:rxjava from 3.1.2 to 3.1.8 in /start

[dependabot]

Bumps io.reactivex.rxjava3:rxjava from 3.1.2 to 3.1.8.

Release notes

Sourced from io.reactivex.rxjava3:rxjava's releases.

v3.1.8

Maven JavaDocs

Bugfixes

• Fix ObservableSwitchMap NullPointerException due to cancel race. (ReactiveX/RxJava#7597)

v3.1.7

Maven JavaDocs

API changes

• Add onDropped callback for onBackpressureLatest. (#7542)
• Add onDropped callback to onBackpressureBuffer. (#7567)

Documentation

• Change summary to caption, because summary is obsolete in HTML5. (#7534)
• Try using https to access the reactive streams javadoc. (#7535)
• Improve Javadoc of Disposable.

Other

• Add minimum GitHub token permissions for workflows. (#7541)
• Create SECURITY.md (#7546)
• Add copyright and license to jar. (#7520)
• Convert CompletableOnErrorComplete$onError inner class to static. (#7575)
• Allow null accumulator type in the collect(Collector) operators. (#7590)

v3.1.6

Maven JavaDocs

API changes

• Add an overload to throttleLatest operator with an onDropped callback. (#7457)
• Add an overload to throttleFirst operator with an onDropped callback. (#7482)
• Add an overload to throttleLast operator with an onDropped callback. (#7488)
• Add an overload to throttleWithTimeout operator with an onDropped callback. (#7510)

Bugfixes

• Fix a race condition in Single.timeout that prevented the timeout signal from happening. (#7515)

Documentation

• Fix formatting in TestObserver/Consumer/Subscriber javadoc html. (#7442)

... (truncated)

Commits

• e6f152d Bump actions/checkout from 4.0.0 to 4.1.0 (#7601)
• 8ad3095 Bump actions/setup-java from 3.12.0 to 3.13.0 (#7600)
• dd1b5ad Bump actions/cache from 3.3.1 to 3.3.2 (#7599)
• f4bb3bd Bump actions/checkout from 3.6.0 to 4.0.0 (#7598)
• 542374c 3.x: Fix ObservableSwitchMap NPE due to cancel race (#7597)
• 13a8d83 Hash-pin GitHub Actions (#7594)
• a57ad01 Allow nullable acc. type on Observable.collect too (supplement #7590)
• 9ebf221 Remove @NonNull annotation from Collector container type parameter. (#7590)
• 9975460 Bump com.google.guava:guava from 32.1.1-jre to 32.1.2-jre (#7589)
• 49357c4 Bump gradle/wrapper-validation-action from 1.0.6 to 1.1.0 (#7586)
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