Support the Spring Boot Restart ClassLoader (#267, #268). Many thanks to @michael-simons for finding the (nontrivial) solution to getting this working, including pull requests implementing this change, complete with unit tests!
Also restores support for custom ClassLoaderHandler
instances, which can be added using a ServiceLoader
(#266, also by @michael-simons). This was broken in the transition from FastClasspathScanner to ClassGraph.