Bump com.fasterxml.jackson.* dependencies from 2.14.2 to 2.15.2

[unkish]

Closes #1531 and #1532

• bump gradle version from 6.8.3 to 7.6.1 in jsonschema2pojo-gradle-plugin/example/android (version supporting multi-release jar)

[unkish]

Short description of build failure reason

It appears that there are 2 issues at play:

1. "Failed to transform jackson-core-2.15.0.jar" / "Workarounds for Jetifier issues"

   • https://issuetracker.google.com/issues/283715193#comment3

   In the meantime, I found a workaround which is disabling Jetifier for jackson-core by adding the following to gradle.properties: android.jetifier.ignorelist = jackson-core

   • https://issuetracker.google.com/issues/184622491#comment1

   Case 2: If you still need Jetifier to migrate other libraries, but not the one that is failing your build, then you can disable Jetifier specifically for that library by setting

2. "Gradle 7.4 fails on multi release jar's with JDK 19 code #24390"

Version 2.15.0-rc1 of jackson-core introduces a multi-release jar [link to release notes], which is likely the reason why this error occurs on this particular version and not earlier versions.

Notes

• gradle versions in jsonschema2pojo-gradle-plugin\example\java and jsonschema2pojo-gradle-plugin were not updated.

Would it make sense to update (align) them as well ?

[joelittlejohn]

Thanks for this change. I think we can leave the gradle version alone in jsonschema2pojo-gradle-plugin\example\java and show the earliest version supported. I'm also happy to leave it alone in jsonschema2pojo-gradle-plugin to avoid any problems with the release. We can update as we need to.