feat: Implement identity caching #1512

Job	Run time
Build Distribution Bundle	35s
Test Jest (16.x)	31s
Test Jest (17.x)	37s
Test Jest (18.x)	30s
Test Jest (19.x)	29s
Test Jest (20.x)	23s
Get Bundle Size from Current Branch	22s
Get Bundle Size from Master	9s
Core Tests / Core SDK Tests	1m 16s
Calculate Bundled Diff / Calculate Bundle Size Difference	9s
Generate Report	1s
Test Stub	34s
Integration Tests: Browserfy Common JS / Browserfy CJS Test	1m 1s
Integration Tests: webpack Common JS / webpack CJS Test	1m 15s
Integration Tests: Rollup Common JS / Rollup CJS Test	1m 3s
Integration Tests: Rollup Module JS / Rollup Module Test	1m 0s
Integration Tests: webpack Module JS / webpack Module Test	1m 0s
Integration Tests: Require JS / Require JS Test	48s
Save PR Number for Dependabot Automerge / Save PR Number for Dependabot Automerge	0s
	11m 43s

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