Bump elliptic from 6.5.7 to 6.6.1 #634

Job	Run time
CI / Context	1s
CI / Generate matrix	20s
CI / Check governance	1s
CI / 8.1 prf-low mysql57 phpunit all	1m 10s
CI / 8.2 mariadb phpunit all	1m 27s
CI / 8.3 mysql80 phpunit all	1m 27s
CI / 8.3 mysql84 phpunit all	1m 10s
CI / 8.1 mysql57 phplinting	1m 28s
CI / 8.1 mysql57 endtoend root job1	1m 53s
CI / 8.3 mysql80 endtoend root job1	1m 58s
CI / 8.1 mysql57 endtoend root job2	1m 50s
CI / 8.3 mysql80 endtoend root job2	2m 4s
CI / 8.1 mysql57 js	1m 12s
CI / Dispatch tag patch release	0s
	16m 1s

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