fix(goto): wait pre promises #428

Job	Run time
matrix	3s
test (@browserless/benchmark)	43s
test (browserless)	2m 55s
test (@browserless/cli)	43s
test (@browserless/devices)	43s
test (@browserless/errors)	2m 17s
test (@browserless/function)	2m 57s
test (@browserless/goto)	5m 28s
test (@browserless/lighthouse)	3m 9s
test (@browserless/pdf)	39s
test (@browserless/screencast)	2m 46s
test (@browserless/screenshot)	2m 50s
test (@browserless/test)	43s
finish	0s
	25m 56s

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