Bump okio from 2.2.2 to 2.4.0

[dependabot-preview]

Bumps okio from 2.2.2 to 2.4.0.

Changelog

Sourced from okio's changelog.

Version 2.4.0

2019-08-26

• New: Upgrade to Kotlin 1.3.50.

Version 2.3.0

2019-07-29

This release changes our build from Kotlin-JVM to Kotlin-multiplatform (which includes JVM).
Both native and JavaScript platforms are unstable preview releases and subject to
backwards-incompatible changes in forthcoming releases.

To try Okio in a multiplatform project use this Maven coordinate:

api('com.squareup.okio:okio-multiplatform:2.3.0')

You’ll also need to [enable Gradle metadata][gradle_metadata] in your project's settings. The
artifact name for JVM projects has not changed.

• New: Upgrade to Kotlin 1.3.40.
• Fix: Use Gradle api instead of implementation for the kotlin-stdlib dependency.
• Fix: Don't block unless strictly necessary in BufferedSource.peek().

Version 1.17.4

2019-04-29

• Fix: Don't block unless strictly necessary in BufferedSource.peek().

Commits

• 35a6919 Prepare for release 2.4.0.
• 1ab5136 Merge pull request #650 from square/jakew/repeat/2019-08-23
• 533b7da Remove TestUtils.repeat in favor of Kotlin repeat
• 589c56c Kotlin 1.3.50 (#649)
• 29c16f9 Merge pull request #648 from square/egorand/190815/kotlin-1.3.50-eap
• efaae11 Kotlin 1.3.50-eap
• a93f96c Update ktlint gradle to 8.2.0 version. (#642)
• 16cde1a Merge pull request #644 from square/egorand/190805/kill-node
• 9376cb3 Merge pull request #643 from square/egorand/190804/gradle-5.5.1
• 5de9874 Node plugin is not needed anymore
• Additional commits viewable in compare view

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