Merge pull request #313 from kabalin/nvm-fix #694

Job	Run time
CI test (make validate)	1m 2s
Code coverage (codecov)	57s
Build moodle-plugin-ci.phar	36s
Integration tests (8.3, main, true)	7m 3s
Integration tests (8.3, MOODLE_404_STABLE, true)	6m 18s
Integration tests (8.2, MOODLE_403_STABLE, true)	6m 14s
Integration tests (8.2, MOODLE_402_STABLE, true)	6m 1s
Integration tests (8.1, MOODLE_401_STABLE, true)	6m 54s
Integration tests (8.0, MOODLE_400_STABLE)	5m 41s
Integration tests (8.0, MOODLE_311_STABLE)	5m 9s
Integration tests (7.4, MOODLE_39_STABLE)	4m 55s
Integration tests (PHAR) (8.3, main, true)	6m 13s
SelfUpdate tests (PHAR) (8.3)	33s
Integration tests (PHAR) (8.3, MOODLE_404_STABLE, true)	6m 2s
SelfUpdate tests (PHAR) (8.2)	34s
Integration tests (PHAR) (8.2, MOODLE_403_STABLE, true)	6m 13s
SelfUpdate tests (PHAR) (8.1)	19s
Integration tests (PHAR) (8.1, MOODLE_402_STABLE, true)	5m 25s
SelfUpdate tests (PHAR) (8.0)	31s
Integration tests (PHAR) (8.0, MOODLE_401_STABLE, true)	6m 33s
SelfUpdate tests (PHAR) (7.4)	17s
Integration tests (PHAR) (7.4, MOODLE_400_STABLE)	5m 6s
	1h 28m 36s

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