Bump cross-spawn from 7.0.3 to 7.0.6 (#270) #523

Job	Run time
CI / Context	1s
CI / Generate matrix	19s
CI / Check governance	1s
CI / 8.1 prf-low mysql57 phpunit all	2m 11s
CI / 8.2 mariadb phpunit all	2m 6s
CI / 8.3 mysql80 phpunit all	2m 21s
CI / 8.3 mysql84 phpunit all	2m 35s
CI / 8.1 mysql57 phplinting	1m 42s
CI / 8.1 mysql57 endtoend root	3m 57s
CI / 8.3 mysql80 endtoend root	3m 54s
CI / 8.1 mysql57 js	3m 30s
CI / Dispatch tag patch release	3s
	22m 40s

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