Rust

Add Dup Sort Custom Comparator support #510

Job	Run time
Check the heed3 project (ubuntu-latest)	29s
Check all the features of the heed3 project	6m 42s
Ensure clippy is happy on heed and heed3	23s
Check all the features of the heed project	37s
Run the heed examples (ubuntu-latest)	26s
Check the heed3 project (windows-latest)	1m 44s
Ensure the heed and heed3 project are formatted	12s
Run the heed examples (macos-latest)	39s
Run the heed3 examples (ubuntu-latest)	24s
Check the heed3 project (macos-latest)	40s
Run the heed3 examples (macos-latest)	31s
Test the heed3 project (ubuntu-latest)	47s
Test the heed project (ubuntu-latest)	42s
Test the heed3 project (windows-latest)	4m 20s
Ensure heed3 is not erasing heed	3s
Test the heed3 project (macos-latest)	48s
Test the heed project (windows-latest)	3m 3s
Test the heed project (macos-latest)	52s
	23m 22s

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