Rust

Add Dup Sort Custom Comparator support #509

Job	Run time
Ensure clippy is happy on heed and heed3	23s
Check all the features of the heed project	10s
Check all the features of the heed3 project	33s
Check the heed3 project (ubuntu-latest)	28s
Check the heed3 project (windows-latest)	1m 43s
Run the heed examples (ubuntu-latest)	14s
Ensure the heed and heed3 project are formatted	14s
Run the heed3 examples (ubuntu-latest)	24s
Run the heed examples (macos-latest)	21s
Check the heed3 project (macos-latest)	28s
Run the heed3 examples (macos-latest)	33s
Test the heed3 project (ubuntu-latest)	45s
Test the heed project (ubuntu-latest)	43s
Test the heed3 project (windows-latest)	4m 9s
Ensure heed3 is not erasing heed	4s
Test the heed project (windows-latest)	3m 33s
Test the heed3 project (macos-latest)	48s
Test the heed project (macos-latest)	38s
	16m 11s

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