chore(deps-dev): bump stylelint from 15.6.2 to 15.10.3 #1672

Job	Run time
Lint (js)	2m 5s
Lint (hbs)	1m 34s
Lint (css)	1m 54s
Tests	4m 50s
Floating Tests	6m 21s
Compatibility Tests (ember-lts-4.8)	9m 20s
Compatibility Tests (ember-lts-4.4)	6m 24s
Compatibility Tests (ember-release)	7m 58s
Compatibility Tests (ember-beta)	7m 56s
Compatibility Tests (ember-canary)	8m 1s
Compatibility Tests (embroider-safe)	6m 57s
Compatibility Tests (embroider-optimized)	6m 13s
	1h 9m 33s

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