Remove split module for package org.jboss.resteasy.concurrent

Both resteasy.core and resteasy.core.spi provide the package "org.jboss.resteasy.concurrent"

See

• https://github.com/resteasy/resteasy/tree/main/resteasy-core/src/main/java/org/jboss/resteasy/concurrent
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• https://github.com/resteasy/resteasy/tree/main/resteasy-core-spi/src/main/java/org/jboss/resteasy/concurrent
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When using resteasy in a Java modularized app, the result is a "split package" error.

Example:

 error: module org.apache.commons.lang3 reads package org.jboss.resteasy.concurrent from both resteasy.core.spi and resteasy.core

Would it be possible to rename one package or to move all the classes of that package into one module?

(I did not create a full MWE, but have a small API there: https://github.com/koppor/jabref/pull/628)