[bug] Stable sort changes for v8

[sirugh]

Description

Array.sort changed from node 10 to node 12. The sort function used here was not resilient to this, so it broke.

https://v8.dev/features/stable-sort
nodejs/node#27871

Related Issue

Closes PWA-690.

Acceptance

Verification Stakeholders

@zetlen

Specification

Verification Steps

1. nvm install 12
2. nvm use 12
3. yarn clean:all
4. yarn install
5. yarn test --coverage=0 packages/pwa-buildpack/lib/Utilities/__tests__/loadEnvironment.spec.js

Screenshots / Screen Captures (if appropriate)

Checklist

• I have added tests to cover my changes, if necessary.

• I have updated the documentation accordingly, if necessary.

[PWAStudioBot]

	Fails
🚫	node` failed.
🚫	Unit tests in the following files did not pass 😔. All tests must pass before this PR can be merged packages/peregrine/lib/talons/CheckoutPage/__tests__/useCheckoutPage.spec.js

	Messages
📖	Associated JIRA tickets: PWA-690.
📖	DangerCI Failures related to missing labels/description/linked issues/etc will persist until the next push or next nightly build run (assuming they are fixed).
📖	Access a deployed version of this PR here. Make sure to wait for the "pwa-pull-request-deploy" job to complete.

Log

ERROR ON TASK: unitTests

Error:  Danger had errors running. See message(s) above for more details.
danger-results://tmp/danger-results.json

Generated by 🚫 dangerJS against 2893d0f

[devops-pwa-codebuild]

Performance Test Results

The following fails have been reported by WebpageTest. These numbers indicates a possible performance issue with the PR which requires further manual testing to validate.

https://pr-2497.pwa-venia.com : LH Performance Expected 0.85 Actual 0.57, LH Best Practices Expected 1 Actual 0.92
https://pr-2497.pwa-venia.com/venia-tops.html : LH Performance Expected 0.75 Actual 0.37, LH Best Practices Expected 1 Actual 0.92
https://pr-2497.pwa-venia.com/valeria-two-layer-tank.html : LH Performance Expected 0.8 Actual 0.48, LH Accessibility Expected 0.9 Actual 0.89, LH Best Practices Expected 1 Actual 0.92

[dpatil-magento]

Updated CI test build node to 12.

[zetlen]

LGTM, thank you! I should have known better than to use that sort predicate before.

[dpatil-magento]

packages/peregrine/lib/talons/CheckoutPage/tests/useCheckoutPage.spec.js already exists on develop with node12. I will create seperate ticket for this.

I have verified this pr on local and on CI with node 10 and 12, looks good.