1. Thanks for Hamcrest

2. Current hamcrest.jar are hard to bundle into other software due to missing licensing information.

Suggested changes are:

2.1) Package license as META-INF/LICENSE. Current one is LICENSE.txt, and de-facto standard is META-INF/LICENSE. The license files packaged at the root cause problems with Android.
Basically whoever makes an uberjar they have to implement "license merger", and typically they configure for META-INF/LICENSE.
2.2) Please add Bundle-License: BSD-3-Clause manifest entry (where BSD-3-Clause is SPDX identifier, see https://osgi.org/specification/osgi.core/7.0.0/framework.module.html#framework.module-bundle-license )
Unfortunately, there are lots of BSD-style licenses, and it is hard to tell what "New BSD License" means.
2.3) Even though 2.1 and 2.2 would be great, you might want to use BSD-3-Clause for <licence><name> tag in pom.xml. The use of SPDX in pom is not common yet, however BSD-3-Clause there would help even humans.