tests

Add "@api" and "@psalm-api" tags support #476

Job	Run time
Tests (8.1, ubuntu-latest, prefer-lowest)	13s
Tests (8.1, ubuntu-latest, prefer-stable)	17s
Tests (8.1, macos-latest, prefer-lowest)	1m 9s
Tests (8.1, macos-latest, prefer-stable)	1m 23s
Tests (8.1, windows-latest, prefer-lowest)	39s
Tests (8.1, windows-latest, prefer-stable)	43s
Tests (8.2, ubuntu-latest, prefer-lowest)	15s
Tests (8.2, ubuntu-latest, prefer-stable)	18s
Tests (8.2, macos-latest, prefer-lowest)	1m 31s
Tests (8.2, macos-latest, prefer-stable)	1m 19s
Tests (8.2, windows-latest, prefer-lowest)	37s
Tests (8.2, windows-latest, prefer-stable)	44s
Tests (8.3, ubuntu-latest, prefer-lowest)	13s
Tests (8.3, ubuntu-latest, prefer-stable)	14s
Tests (8.3, macos-latest, prefer-lowest)	1m 12s
Tests (8.3, macos-latest, prefer-stable)	1m 5s
Tests (8.3, windows-latest, prefer-lowest)	38s
Tests (8.3, windows-latest, prefer-stable)	39s
Tests (8.4, ubuntu-latest, prefer-lowest)	17s
Tests (8.4, ubuntu-latest, prefer-stable)	13s
Tests (8.4, macos-latest, prefer-lowest)	1m 44s
Tests (8.4, macos-latest, prefer-stable)	1m 39s
Tests (8.4, windows-latest, prefer-lowest)	41s
Tests (8.4, windows-latest, prefer-stable)	41s
	18m 24s

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