ci: Add Browserstack GIthub workflow #1411

Job	Run time
Build Distribution Bundle	41s
Test Jest (16.x)	26s
Test Jest (17.x)	36s
Test Jest (18.x)	24s
Test Jest (19.x)	30s
Test Jest (20.x)	26s
Get Bundle Size from Current Branch	31s
Get Bundle Size from Master	9s
Core Tests / Core SDK Tests	1m 17s
Calculate Bundled Diff / Calculate Bundle Size Difference	7s
Generate Report	1s
Test Stub	33s
Integration Tests: Browserfy Common JS / Browserfy CJS Test	1m 7s
Integration Tests: Rollup Common JS / Rollup CJS Test	1m 17s
Integration Tests: Rollup Module JS / Rollup Module Test	1m 6s
Integration Tests: webpack Module JS / webpack Module Test	1m 7s
Integration Tests: webpack Common JS / webpack CJS Test	1m 14s
Integration Tests: Require JS / Require JS Test	44s
Save PR Number for Dependabot Automerge / Save PR Number for Dependabot Automerge	0s
	12m 16s

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