Fix 'AbstractCompile.destinationDir property has been deprecated' error when using Gradle 8

[surecloud-jleite]

I've got this warning when using Gradle 8.11

The AbstractCompile.destinationDir property has been deprecated.org.jsonschema2pojo

This is scheduled to be removed in Gradle 9.0.
The AbstractCompile.destinationDir property has been deprecated.

[unkish]

Hi

Since jsonschema2pojo-gradle-plugin does not explicitly reference AbstractCompile#destinationDir then theoretically given warning should not pose a problem.

I've managed to trace down the source/location of given warning to

jsonschema2pojo/jsonschema2pojo-gradle-plugin/src/main/groovy/org/jsonschema2pojo/gradle/GenerateJsonSchemaJavaTask.groovy

Line 88 in 50b2fca

configuration.targetVersion = compileJavaTask.getProperties().get("sourceCompatibility")

It looks like that warning is emited due usage of meta properties field (.properties()).
Replacing it with

configuration.targetVersion = compileJavaTask.sourceCompatibility

would make warning go away.

@joelittlejohn what would be your opinion here - should the change be applied or it's not worth it ?

[joelittlejohn]

Thanks for digging into this @unkish. Yes, this looks like a good change to me.