Prepare for 4.5.0 release #656

Job	Run time
Code coverage (codecov)	55s
CI test (make validate)	59s
Build moodle-plugin-ci.phar	31s
Integration tests (8.3, main)	7m 9s
Integration tests (8.3, MOODLE_404_STABLE)	7m 26s
Integration tests (8.2, MOODLE_403_STABLE)	6m 27s
Integration tests (8.2, MOODLE_402_STABLE)	6m 29s
Integration tests (8.1, MOODLE_401_STABLE)	7m 27s
Integration tests (8.0, MOODLE_400_STABLE)	7m 1s
Integration tests (8.0, MOODLE_311_STABLE)	6m 36s
Integration tests (7.4, MOODLE_39_STABLE)	5m 53s
SelfUpdate tests (PHAR) (8.3)	50s
Integration tests (PHAR) (8.3, main)	6m 8s
SelfUpdate tests (PHAR) (8.2)	35s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE)	5m 57s
SelfUpdate tests (PHAR) (8.1)	34s
SelfUpdate tests (PHAR) (8.0)	45s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE)	6m 0s
SelfUpdate tests (PHAR) (7.4)	9s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE)	5m 37s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE)	6m 28s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 39s
	1h 35m 35s

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