Bump gds-sso from 18.0.0 to 18.1.0 #199

Job	Run time
Lint Ruby / Run RuboCop	20s
Security Analysis / Run Brakeman	20s
Lint SCSS / Run Stylelint	15s
Lint JavaScript / Run Standardx	14s
Test JavaScript / Run Jasmine	1m 9s
Test Ruby / Run RSpec	2m 16s
	4m 34s

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