Prepare for 4.5.5 release #716

Job	Run time
CI test (make validate)	1m 2s
Code coverage (codecov)	59s
Build moodle-plugin-ci.phar	31s
Integration tests (8.3, main, true)	6m 50s
Integration tests (8.3, MOODLE_405_STABLE, true)	6m 44s
Integration tests (8.3, MOODLE_404_STABLE, true)	6m 29s
Integration tests (8.2, MOODLE_403_STABLE, true)	6m 15s
Integration tests (8.2, MOODLE_402_STABLE, true)	6m 5s
Integration tests (8.1, MOODLE_401_STABLE, true)	7m 18s
Integration tests (8.0, MOODLE_400_STABLE)	5m 52s
Integration tests (8.0, MOODLE_311_STABLE)	5m 34s
Integration tests (7.4, MOODLE_39_STABLE)	5m 2s
SelfUpdate tests (PHAR) (8.3)	49s
Integration tests (PHAR) (8.3, main, true)	6m 15s
SelfUpdate tests (PHAR) (8.2)	36s
Integration tests (PHAR) (8.3, MOODLE_405_STABLE, true)	6m 8s
SelfUpdate tests (PHAR) (8.1)	23s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE, true)	6m 6s
SelfUpdate tests (PHAR) (8.0)	26s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE, true)	5m 55s
SelfUpdate tests (PHAR) (7.4)	7s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE, true)	5m 25s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE, true)	6m 16s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 8s
	1h 42m 15s

Provide feedback