Add support for multiple nvd suppression files

[luxcodes]

Description

Adding support for multiple suppression files would help in build runs where having a base suppression and any additional suppressions are merged or used.

This is a feature added in DependencyCheck which can be found here. https://github.com/jeremylong/DependencyCheck/pull/759

Version

RELEASE 4.0

Java version

openjdk version "11.0.11" 2021-04-20
OpenJDK Runtime Environment AdoptOpenJDK-11.0.11+9 (build 11.0.11+9)
OpenJDK 64-Bit Server VM AdoptOpenJDK-11.0.11+9 (build 11.0.11+9, mixed mode)

Installation compliance

• [X] I have read again and made sure that I'm following exactly the instructions for my tool of choice (Leiningen, Clojure CLI, Clojure CLI Tool).
• [X] I understand that false positives can be skipped locally and should be reported to DependencyCheck.

[vemv]

Thanks!

Seems a fair suggestion.

Just as a heads up, nowadays I cannot be as involved with nvd-clojure development so this would be more of a "PR welcome" type of issue.