Version 4.0: Clang 18 Compatability

This is a fairly minor update to the Makefile to add a new linker dependency necessary for compilation with Clang 18+.

Version 3.0 (llvm 14)

This is a breaking change necessary for compatibility with llvm 14 (at the expense of compatibility with llvm 10 - not sure about version in between). It was necessary due to the change making this constructor protected: https://github.com/llvm/llvm-project/blob/e59f648d698efe58b96e9b6224449b2b8cfa872a/clang/include/clang/Tooling/CommonOptionsParser.h#L76, which was discussed here: https://reviews.llvm.org/D94420.

Version 2.0

This version is compatible with llvm toolchain version 7 and later.

Last version that works with llvm 6

Merge pull request #6 from mmore500/patch-1

Pin Singularity image to Ubuntu 18.04

Version 1.0

First feature-complete release!