ci fixing #18

Job	Run time
CI test (make validate)	1m 5s
Code coverage (codecov)	0s
Build moodle-plugin-ci.phar	29s
Integration tests (8.3, main, true)	1m 26s
Integration tests (8.3, MOODLE_404_STABLE, true)	1m 16s
Integration tests (8.2, MOODLE_403_STABLE, true)	1m 15s
Integration tests (8.2, MOODLE_402_STABLE, true)	1m 21s
Integration tests (8.1, MOODLE_401_STABLE, true)	1m 5s
Integration tests (8.0, MOODLE_400_STABLE)	1m 11s
Integration tests (8.0, MOODLE_311_STABLE)	1m 11s
Integration tests (7.4, MOODLE_39_STABLE)	53s
SelfUpdate tests (PHAR) (8.3)	33s
Integration tests (PHAR) (8.3, main, true)	1m 20s
SelfUpdate tests (PHAR) (8.2)	32s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE, true)	1m 47s
SelfUpdate tests (PHAR) (8.1)	18s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE, true)	1m 17s
SelfUpdate tests (PHAR) (8.0)	23s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE, true)	1m 7s
SelfUpdate tests (PHAR) (7.4)	14s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE, true)	1m 20s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	58s
	21m 1s

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