Prepare for 4.5.2 release #668

Job	Run time
Code coverage (codecov)	54s
CI test (make validate)	2m 40s
Build moodle-plugin-ci.phar	36s
Integration tests (8.3, main)	6m 8s
Integration tests (8.3, MOODLE_404_STABLE)	6m 23s
Integration tests (8.2, MOODLE_403_STABLE)	6m 15s
Integration tests (8.2, MOODLE_402_STABLE)	5m 55s
Integration tests (8.1, MOODLE_401_STABLE)	6m 47s
Integration tests (8.0, MOODLE_400_STABLE)	6m 45s
Integration tests (8.0, MOODLE_311_STABLE)	5m 43s
Integration tests (7.4, MOODLE_39_STABLE)	5m 44s
SelfUpdate tests (PHAR) (8.3)	35s
SelfUpdate tests (PHAR) (8.2)	36s
SelfUpdate tests (PHAR) (8.1)	30s
Integration tests (PHAR) (8.3, main)	5m 43s
SelfUpdate tests (PHAR) (8.0)	33s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE)	5m 43s
SelfUpdate tests (PHAR) (7.4)	13s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE)	5m 38s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE)	5m 43s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE)	6m 24s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	6m 6s
	1h 31m 34s

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