Prepare for 4.5.1 release #692

Job	Run time
Code coverage (codecov)	0s
CI test (make validate)	55s
Build moodle-plugin-ci.phar	26s
Integration tests (8.3, main)	6m 15s
Integration tests (8.3, MOODLE_404_STABLE)	6m 10s
Integration tests (8.2, MOODLE_403_STABLE)	6m 10s
Integration tests (8.2, MOODLE_402_STABLE)	5m 55s
Integration tests (8.1, MOODLE_401_STABLE)	6m 20s
Integration tests (8.0, MOODLE_400_STABLE)	6m 32s
Integration tests (8.0, MOODLE_311_STABLE)	6m 15s
Integration tests (7.4, MOODLE_39_STABLE)	5m 40s
Integration tests (PHAR) (8.3, main)	5m 42s
SelfUpdate tests (PHAR) (8.3)	38s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE)	5m 53s
SelfUpdate tests (PHAR) (8.2)	31s
SelfUpdate tests (PHAR) (8.1)	25s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE)	5m 35s
SelfUpdate tests (PHAR) (8.0)	23s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE)	5m 26s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE)	6m 13s
SelfUpdate tests (PHAR) (7.4)	8s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 53s
	1h 27m 25s

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