ci: Add Staging Process (Step 3) to sync branches #1495

Job	Run time
Build Distribution Bundle	36s
Test Jest (16.x)	27s
Test Jest (17.x)	38s
Test Jest (18.x)	32s
Test Jest (19.x)	28s
Test Jest (20.x)	25s
Get Bundle Size from Master	10s
Get Bundle Size from Current Branch	30s
Core Tests / Core SDK Tests	3m 9s
Calculate Bundled Diff / Calculate Bundle Size Difference	8s
Generate Report	1s
Test Stub	40s
Integration Tests: webpack Common JS / webpack CJS Test	59s
Integration Tests: Browserfy Common JS / Browserfy CJS Test	1m 4s
Integration Tests: Rollup Common JS / Rollup CJS Test	1m 2s
Integration Tests: webpack Module JS / webpack Module Test	1m 9s
Integration Tests: Rollup Module JS / Rollup Module Test	1m 5s
Integration Tests: Require JS / Require JS Test	45s
Save PR Number for Dependabot Automerge / Save PR Number for Dependabot Automerge	0s
	13m 48s

Provide feedback