GitlabCI: Use docker:dind (latest) for better API compatibility #418

Job	Run time
test-client (3.8, test,queuable,sentry)	34s
test-client (3.8, test)	32s
test-client (3.9, test,queuable,sentry)	32s
test-client (3.10, test,queuable,sentry)	41s
test-docker	3m 7s
test-client (3.12, test,queuable,sentry)	27s
test-client (3.9, test)	34s
test-client (3.12, test)	30s
test-client (3.10, test)	24s
	7m 21s

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