Add Kotlin extensions for Criteria [DATAJDBC-522]

[spring-projects-issues]

Mark Paluch opened DATAJDBC-522 and commented

We should add Kotlin extensions for easier consumption of Criteria when using Kotlin. See:

 

• https://github.com/spring-projects/spring-data-r2dbc/blob/master/src/main/kotlin/org/springframework/data/r2dbc/core/CriteriaStepExtensions.kt
• https://github.com/spring-projects/spring-data-r2dbc/blob/master/src/test/kotlin/org/springframework/data/r2dbc/core/CriteriaStepExtensionsTests.kt

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Referenced from: pull request #240