Bump rxkotlin from 2.1.0 to 2.4.0

[dependabot-preview]

Bumps rxkotlin from 2.1.0 to 2.4.0.

Release notes

Sourced from rxkotlin's releases.

RxKotlin 2.4.0

• Kotlin updated to 1.3.40
• RxJava updated to 2.2.10
• Migrated to Gradle 5.4.1 and Gradle Kotlin DSL

RxKotlin 2.4.0-beta.1

• Kotlin updated to 1.3.40
• RxJava updated to 2.2.10
• Migrated to Gradle 5.4.1 and Gradle Kotlin DSL

RxKotlin 2.3.0

This is the first release for RxKotlin in quite some time. I apologize it took so long.

• RxJava updated to 2.2.0
• Kotlin updated to 1.2.60
• Silence unused and platform warnings #179
• Add missing @​CheckReturnValue annoations #180
• Add zero-arg flatMapIterable and concatMapIterable #185
• Make cast and ofType operate on wildcard types rather than Any #176
• Add Flowables.create with lambda as last parameter #188
• Change return type of Flowable.withLatestFrom #193

Thank you everyone for your contributions!

RxKotlin 2.2.0

This is a breaking release removing some annoyances, specifically the toSingle() and toMaybe() extension functions targeting futures, callables, and even single T items.

These caused far more harm than good, as they often clashed with other libraries and people's own extensions. For instance, RxKotlinFX has a Dialog<T>.toMaybe() extension which emits a dialog's response. This clashed directly with the toMaybe() in RxKotlin. Rather than deprecating these extensions, they were just removed to prevent further hindrance.

Deprecated Observable#combineLatest() and its Flowable counterpart have been removed as well, and you can use the Observables and Flowables factories instead.

RxJava and Kotlin dependencies have been updated as well.

Commits

• 7a21c3e prepare version 2.4.0
• f148892 handle compiler warnings in tests
• b35000f specify function return types explicitly; break long functions into multiple ...
• 9c28937 change rxjava dependency from implementation to api
• b383b81 Prepare 2.4.0-beta.1 release
• f79973a Update publication pom
• 704a97b Prepare 2.4.0-beta release
• acff6f4 Update readme files
• 92df626 Merge pull request #218 from ReactiveX/2.x-migr
• c6c1133 Minor publishing changes
• 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.

---

Note: This repo was added to Dependabot recently, so you'll receive a maximum of 5 PRs for your first few update runs. Once an update run creates fewer than 5 PRs we'll remove that limit.

You can always request more updates by clicking Bump now in your Dependabot dashboard.

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)
• @dependabot use these labels will set the current labels as the default for future PRs for this repo and language
• @dependabot use these reviewers will set the current reviewers as the default for future PRs for this repo and language
• @dependabot use these assignees will set the current assignees as the default for future PRs for this repo and language
• @dependabot use this milestone will set the current milestone as the default for future PRs for this repo and language
• @dependabot badge me will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot dashboard:

• Update frequency (including time of day and day of week)
• Pull request limits (per update run and/or open at any time)
• Out-of-range updates (receive only lockfile updates, if desired)
• Security updates (receive only security updates, if desired)