Lock file maintenance #1739

Job	Run time
PHPUnit tests (lowest, 8.2, ubuntu-latest)	44s
PHPUnit tests (lowest, 8.2, windows-latest)	1m 29s
PHPUnit tests (lowest, 8.3, ubuntu-latest)	48s
PHPUnit tests (lowest, 8.3, windows-latest)	1m 1s
PHPUnit tests (lowest, 8.4, ubuntu-latest)	41s
PHPUnit tests (lowest, 8.4, windows-latest)	1m 2s
PHPUnit tests (highest, 8.2, ubuntu-latest)	49s
PHPUnit tests (highest, 8.2, windows-latest)	1m 8s
PHPUnit tests (highest, 8.3, ubuntu-latest)	50s
PHPUnit tests (highest, 8.3, windows-latest)	1m 1s
PHPUnit tests (highest, 8.4, ubuntu-latest)	42s
PHPUnit tests (highest, 8.4, windows-latest)	1m 1s
PHPUnit tests (locked, 8.2, ubuntu-latest)	47s
PHPUnit tests (locked, 8.2, windows-latest)	1m 9s
PHPUnit tests (locked, 8.3, ubuntu-latest)	45s
PHPUnit tests (locked, 8.3, windows-latest)	1m 2s
PHPUnit tests (locked, 8.4, ubuntu-latest)	41s
PHPUnit tests (locked, 8.4, windows-latest)	1m 1s
	16m 41s

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