Add TopoSort, a topological sort library that produces topological ordered nodes and dependence-free subsets. (#95)

Author: williamw520

README.md

@@ -150,6 +150,7 @@ TOC is generated by [markdown-toc](https://github.com/jonschlinkert/markdown-toc
 - [booniepepper/zig-data-structures](https://github.com/booniepepper/zig-data-structures) : Home to some experiments in Zig data structures.
 - [deckarep/ziglang-set](https://github.com/deckarep/ziglang-set) : A generic and general purpose Set implementation for the Zig language.
 - [yamafaktory/hypergraphz](https://github.com/yamafaktory/hypergraphz) : HypergraphZ - A Hypergraph Implementation in Zig.
+- [williamw520/toposort](https://github.com/williamw520/toposort) : Topological sort library that produces topological ordered nodes and dependence-free subsets.
 
 ## String Processing