Rust

Combined version of LMDB mdb.master and mdb.master3 #312

Job	Run time
Test the heed3 project (ubuntu-latest)	25s
Test the heed3 project (windows-latest)	29s
Test the heed project (ubuntu-latest)	22s
Test the heed3 project (macos-latest)	26s
Check all the features of the heed project (ubuntu-latest)	25s
Test the heed project (windows-latest)	27s
Check all the features of the heed3 project (ubuntu-latest)	7s
Check all the features of the heed project (macos-latest)	20s
Check all the features of the heed3 project (macos-latest)	11s
Check the heed3-encryption project (ubuntu-latest)	51s
Check the heed3-encryption project (windows-latest)	50s
Test the heed project (macos-latest)	1s
Check the heed3-encryption project (macos-latest)	23s
Run the heed examples (ubuntu-latest)	38s
Run the heed examples (macos-latest)	24s
Ensure the heed project is formatted	13s
Run the heed3-encryption examples (ubuntu-latest)	59s
Run the heed3 examples (ubuntu-latest)	1m 30s
Run the heed3-encryption examples (macos-latest)	26s
Run the heed3 examples (macos-latest)	20s
	9m 47s

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