Adjust published dependencies to remove specific grails-bom or other grails-core versions

[jamesfredley]

we will want to resolve these for the final release so the plugin does not reference a specific version of grails-bom or other grails-core versions.

This also reference specific versions of Spring, which should also be updated.

https://repository.apache.org/content/repositories/staging/org/apache/grails/grails-quartz/4.0.0-RC2/grails-quartz-4.0.0-RC2.pom

https://repository.apache.org/content/repositories/staging/org/apache/grails/grails-quartz/4.0.0-RC2/grails-quartz-4.0.0-RC2.module