Rust

Add Dup Sort Custom Comparator support #516

Job	Run time
Check all the features of the heed project	29s
Check all the features of the heed3 project	44s
Check the heed3 project (ubuntu-latest)	31s
Ensure clippy is happy on heed and heed3	26s
Check the heed3 project (windows-latest)	1m 1s
Check the heed3 project (macos-latest)	27s
Run the heed examples (ubuntu-latest)	35s
Ensure the heed and heed3 project are formatted	12s
Run the heed examples (macos-latest)	41s
Run the heed3 examples (ubuntu-latest)	23s
Run the heed3 examples (macos-latest)	36s
Test the heed3 project (ubuntu-latest)	41s
Test the heed project (ubuntu-latest)	33s
Test the heed3 project (windows-latest)	2m 41s
Test the heed project (windows-latest)	2m 53s
Ensure heed3 is not erasing heed	5s
Test the heed3 project (macos-latest)	51s
Test the heed project (macos-latest)	54s
	14m 43s

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