Prepare for 4.2.0 release #557

Job	Run time
CI test (make validate)	31s
CI test (make validate)	31s
Code coverage (codecov)	0s
Code coverage (codecov)	0s
Build moodle-plugin-ci.phar	36s
Build moodle-plugin-ci.phar	36s
Integration tests (8.2, main)	5m 18s
Integration tests (8.2, main)	5m 18s
Integration tests (8.2, MOODLE_403_STABLE)	5m 21s
Integration tests (8.2, MOODLE_403_STABLE)	5m 21s
Integration tests (8.2, MOODLE_402_STABLE)	5m 33s
Integration tests (8.2, MOODLE_402_STABLE)	5m 33s
Integration tests (8.1, MOODLE_401_STABLE)	6m 1s
Integration tests (8.1, MOODLE_401_STABLE)	6m 1s
Integration tests (8.0, MOODLE_400_STABLE)	6m 1s
Integration tests (8.0, MOODLE_400_STABLE)	6m 1s
Integration tests (8.0, MOODLE_311_STABLE)	5m 46s
Integration tests (8.0, MOODLE_311_STABLE)	5m 46s
Integration tests (7.4, MOODLE_310_STABLE)	4m 58s
Integration tests (7.4, MOODLE_310_STABLE)	4m 58s
Integration tests (7.4, MOODLE_39_STABLE)	5m 4s
Integration tests (7.4, MOODLE_39_STABLE)	5m 4s
Integration tests (7.4, MOODLE_38_STABLE)	26s
Integration tests (7.4, MOODLE_38_STABLE)	5m 15s
Integration tests (PHAR) (8.2, main)	5m 8s
Integration tests (PHAR) (8.2, main)	5m 8s
Integration tests (PHAR) (8.1, MOODLE_403_STABLE)	4m 48s
Integration tests (PHAR) (8.1, MOODLE_403_STABLE)	4m 48s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE)	6m 0s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE)	6m 0s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 5s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 5s
	2h 18m 1s

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