OPT: Bump solid_cable from 3.0.2 to 3.0.3 #593

Job	Run time
Build Image / Development	1m 34s
Build Image / Production	1m 36s
Build Image / Test	1m 42s
Build Image / Cypress	1m 2s
Build Image / Preview	1m 34s
Lint / ESLint - Tests	40s
Lint / ESLint	43s
Preview / Deploy	2s
Lint / Rubocop	22s
Lint / Bundler Audit	18s
Tests / End-to-end - Admin (chrome)	4m 40s
Lint / Brakeman	23s
Tests / End-to-end - Admin (firefox)	4m 59s
Tests / End-to-end - Frontend (chrome)	1m 38s
Lint / Reek	19s
Tests / End-to-end - Frontend (firefox)	1m 34s
Lint / SCSSLint	18s
Tests / Backend	51s
	24m 15s

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