Prepare for 4.5.4 release #696

Job	Run time
Code coverage (codecov)	57s
CI test (make validate)	1m 16s
Build moodle-plugin-ci.phar	30s
Integration tests (8.3, main, true)	6m 29s
Integration tests (8.3, MOODLE_404_STABLE, true)	6m 25s
Integration tests (8.2, MOODLE_403_STABLE, true)	6m 33s
Integration tests (8.2, MOODLE_402_STABLE, true)	6m 15s
Integration tests (8.1, MOODLE_401_STABLE, true)	6m 32s
Integration tests (8.0, MOODLE_400_STABLE)	5m 53s
Integration tests (8.0, MOODLE_311_STABLE)	5m 0s
Integration tests (7.4, MOODLE_39_STABLE)	4m 56s
Integration tests (PHAR) (8.3, main, true)	5m 44s
SelfUpdate tests (PHAR) (8.3)	30s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE, true)	6m 4s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE, true)	6m 28s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE, true)	5m 34s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE, true)	6m 15s
SelfUpdate tests (PHAR) (8.2)	33s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	4m 58s
SelfUpdate tests (PHAR) (8.1)	20s
SelfUpdate tests (PHAR) (8.0)	31s
SelfUpdate tests (PHAR) (7.4)	14s
	1h 27m 57s

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