Lock file maintenance #1705

Job	Run time
PHPUnit tests (lowest, 8.2, ubuntu-latest)	46s
PHPUnit tests (lowest, 8.2, windows-latest)	1m 12s
PHPUnit tests (lowest, 8.3, ubuntu-latest)	48s
PHPUnit tests (lowest, 8.3, windows-latest)	1m 5s
PHPUnit tests (lowest, 8.4, ubuntu-latest)	51s
PHPUnit tests (lowest, 8.4, windows-latest)	1m 10s
PHPUnit tests (highest, 8.2, ubuntu-latest)	47s
PHPUnit tests (highest, 8.2, windows-latest)	1m 15s
PHPUnit tests (highest, 8.3, ubuntu-latest)	50s
PHPUnit tests (highest, 8.3, windows-latest)	1m 9s
PHPUnit tests (highest, 8.4, ubuntu-latest)	44s
PHPUnit tests (highest, 8.4, windows-latest)	1m 5s
PHPUnit tests (locked, 8.2, ubuntu-latest)	43s
PHPUnit tests (locked, 8.2, windows-latest)	1m 13s
PHPUnit tests (locked, 8.3, ubuntu-latest)	42s
PHPUnit tests (locked, 8.3, windows-latest)	1m 6s
PHPUnit tests (locked, 8.4, ubuntu-latest)	47s
PHPUnit tests (locked, 8.4, windows-latest)	1m 3s
	17m 16s

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