Bump micromatch from 4.0.5 to 4.0.8 #614

Job	Run time
ci / Context	1s
ci / Generate matrix	24s
ci / Check governance	1s
ci / 8.1 prf-low mysql57 phpunit all	5m 35s
ci / 8.2 mariadb phpunit all	1m 46s
ci / 8.3 mysql80 phpunit all	1m 47s
ci / 8.1 mysql57 phplinting	1m 6s
ci / 8.1 mysql57 endtoend root job1	1m 46s
ci / 8.3 mysql80 endtoend root job1	2m 4s
ci / 8.1 mysql57 endtoend root job2	1m 59s
ci / 8.3 mysql80 endtoend root job2	2m 19s
ci / 8.1 mysql57 js	1m 7s
ci / 8.1 mysql57 doclinting	1m 36s
ci / Dispatch tag patch release	0s
	21m 31s

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