tests

Add "@package" and "@subpackage" tags support #481

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	16s
Tests (8.1, ubuntu-latest, prefer-stable)	14s
Tests (8.1, macos-latest, prefer-lowest)	1m 45s
Tests (8.1, macos-latest, prefer-stable)	1m 15s
Tests (8.1, windows-latest, prefer-lowest)	39s
Tests (8.1, windows-latest, prefer-stable)	33s
Tests (8.2, ubuntu-latest, prefer-lowest)	19s
Tests (8.2, ubuntu-latest, prefer-stable)	24s
Tests (8.2, macos-latest, prefer-lowest)	1m 26s
Tests (8.2, macos-latest, prefer-stable)	2m 10s
Tests (8.2, windows-latest, prefer-lowest)	42s
Tests (8.2, windows-latest, prefer-stable)	51s
Tests (8.3, ubuntu-latest, prefer-lowest)	21s
Tests (8.3, ubuntu-latest, prefer-stable)	36s
Tests (8.3, macos-latest, prefer-lowest)	1m 17s
Tests (8.3, macos-latest, prefer-stable)	1m 20s
Tests (8.3, windows-latest, prefer-lowest)	37s
Tests (8.3, windows-latest, prefer-stable)	42s
Tests (8.4, ubuntu-latest, prefer-lowest)	14s
Tests (8.4, ubuntu-latest, prefer-stable)	18s
Tests (8.4, macos-latest, prefer-lowest)	1m 48s
Tests (8.4, macos-latest, prefer-stable)	1m 48s
Tests (8.4, windows-latest, prefer-lowest)	39s
Tests (8.4, windows-latest, prefer-stable)	38s
	20m 52s

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