Update dependency es6-promise to v4.2.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
es6-promise	4.1.1 -> 4.2.8

---

Release Notes

stefanpenner/es6-promise

v4.2.8

Compare Source

v4.2.7

Compare Source

v4.2.6

Compare Source

v4.2.5

Compare Source

• remove old try/catch performance hacks, modern runtimes do not require these tricks

v4.2.4

Compare Source

• [Fixes #​305] Confuse webpack

v4.2.3

Compare Source

• Cleanup testem related build configuration
• Use prepublishOnly instead of prepublish (thanks @​rhysd)
• Add Node.js 9, 8 to testing matrix
• drop now unused s3 deployment files
• internal cleanup (thanks to @​bekzod, @​mariusschulz)
• Fixup Changelog

v4.2.2

Compare Source

• Ensure PROMISE_ID works correctly
• internal cleanup (thanks yo @​mariusschulz)

v4.2.1

Compare Source

• drop bower support

v4.2.0

Compare Source

• drop dist from git repo
• add Promise.prototype.finally
• update various build related dependencies
• add CDN links

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by Mend Renovate. View repository job log here.