chore(deps): bump rxjava from 2.2.4 to 2.2.5

[dependabot-preview]

Bumps rxjava from 2.2.4 to 2.2.5.

Release notes

Sourced from rxjava's releases.

2.2.5

Maven

Documentation changes

• Pull 6344: Use correct return type in JavaDocs documentation in elementAtOrDefault.
• Pull 6346: Fix JavaDoc examples using markdown instead of [**code**](https://github.com/code).

Wiki changes

• Pull 6324: Java 8 version for Problem-Solving-Examples-in-RxJava.
• Pull 6343: Update Filtering Observables docs.
• Pull 6351: Updated java example in How-To-Use-RxJava.md file with java 8 version.

Other changes

• Pull 6313: Adding [**NonNull**](https://github.com/NonNull) annotation factory methods.
• Pull 6335: Replace indexed loop with for-each java5 syntax.

Changelog

Sourced from rxjava's changelog.

Version 2.2.5 - December 31, 2018 (Maven)

Documentation changes

• Pull 6344: Use correct return type in JavaDocs documentation in elementAtOrDefault.
• Pull 6346: Fix JavaDoc examples using markdown instead of [**code**](https://github.com/code).

Wiki changes

• Pull 6324: Java 8 version for Problem-Solving-Examples-in-RxJava.
• Pull 6343: Update Filtering Observables docs.
• Pull 6351: Updated java example in How-To-Use-RxJava.md file with java 8 version.

Other changes

• Pull 6313: Adding [**NonNull**](https://github.com/NonNull) annotation factory methods.
• Pull 6335: Replace indexed loop with for-each java5 syntax.

Commits

• 537fa26 Release 2.2.5
• 4f0cdca Update outdated java example in wiki #6331 (#6351)
• 5aef7fe Javadoc: fix examples using markdown instead of code (#6346)
• 5278124 Replace indexed loop with for-each java5 syntax (#6335)
• 3481ed1 Adding NonNull annotation (#6313)
• 913e800 Fix: use correct return type in Javadoc documentation (#6344)
• 1e4e966 2.x: Update Filtering Observables docs (#6343)
• bc40695 #6323 Java 8 version for Problem-Solving-Examples-in-RxJava (#6324)
• See full diff in compare view

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