Fast, simple RadixHeap with update-able weights.
Provides test providing performance benchmarks versus the std::priority_queue.
Benchmarks on Intel Core i7-7820HQ CPU @ 3.9GHz:
Custom push time delta: 0.00218115
STL push time delta: 0.00189612
Custom read time delta: 0.0133945
STL read time delta: 0.00855569