FastClasspathScanner has been renamed to ClassGraph for version 4. This release simply redirects Maven to pull in the new classgraph artifact rather than the fast-classpath-scanner artifact.
Please see project information at:
https://github.com/classgraph/classgraph
Information on porting to the v4 API (including the new Maven dependency rule and the new module "requires" rule) are at:
https://github.com/classgraph/classgraph/wiki/Porting-FastClasspathScanner-code-to-ClassGraph
If you want to stay on the old FastClasspathScanner v3 API, you should depend specifically on fast-classpath-scanner version 3.1.13.
FastClasspathScanner may or may not receive further bugfixes, and numerous bugs have been fixed between FastClasspathScanner version 3.1.13 and ClassGraph version 4, so it is highly recommended that you port your code to use ClassGraph.