Rust

Combined version of LMDB mdb.master and mdb.master3 #359

Job	Run time
Test the heed project (ubuntu-latest)	42s
Check the heed3 project (ubuntu-latest)	24s
Test the heed project (windows-latest)	1m 51s
Check all the features of the heed project (ubuntu-latest)	26s
Check the heed3 project (windows-latest)	1m 13s
Test the heed project (macos-latest)	46s
Check all the features of the heed3 project (ubuntu-latest)	24s
Check all the features of the heed project (macos-latest)	37s
Check the heed3 project (macos-latest)	32s
Check all the features of the heed3 project (macos-latest)	44s
Run the heed examples (ubuntu-latest)	38s
Ensure the heed project is formatted	12s
Run the heed examples (macos-latest)	36s
Run the heed3 examples (ubuntu-latest)	25s
Ensure the heed3 Carho.toml is not erasing heed	3s
Run the heed3 examples (macos-latest)	33s
	10m 6s

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