Prepare for 4.5.4 release #695

Job	Run time
CI test (make validate)	1m 2s
Code coverage (codecov)	58s
Build moodle-plugin-ci.phar	31s
Integration tests (8.3, main, true)	6m 15s
Integration tests (8.3, MOODLE_404_STABLE, true)	7m 1s
Integration tests (8.2, MOODLE_403_STABLE, true)	6m 32s
Integration tests (8.2, MOODLE_402_STABLE, true)	5m 48s
Integration tests (8.1, MOODLE_401_STABLE, true)	6m 32s
Integration tests (8.0, MOODLE_400_STABLE)	5m 27s
Integration tests (8.0, MOODLE_311_STABLE)	5m 4s
Integration tests (7.4, MOODLE_39_STABLE)	4m 54s
Integration tests (PHAR) (8.3, main, true)	5m 56s
SelfUpdate tests (PHAR) (8.3)	32s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE, true)	5m 45s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE, true)	6m 1s
SelfUpdate tests (PHAR) (8.2)	39s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE, true)	5m 36s
SelfUpdate tests (PHAR) (8.1)	18s
SelfUpdate tests (PHAR) (8.0)	24s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE, true)	6m 26s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 5s
SelfUpdate tests (PHAR) (7.4)	13s
	1h 26m 59s

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