chore(deps): update dependency core-js to ^3.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
core-js	^3.8.3 -> ^3.9.0

---

Release Notes

zloirock/core-js

### [`v3.9.0`](https://togithub.com/zloirock/core-js/blob/master/CHANGELOG.md#​390---20210219) [Compare Source](https://togithub.com/zloirock/core-js/compare/v3.8.3...v3.9.0) - Added [`Array` find from last stage 1 proposal](https://togithub.com/tc39/proposal-array-find-from-last) - `Array#findLast` - `Array#findLastIndex` - `%TypedArray%#findLast` - `%TypedArray%#findLastIndex` - Added `%TypedArray%#uniqueBy` method for [array deduplication stage 1 proposal](https://togithub.com/tc39/proposal-array-unique) - `%TypedArray%#uniqueBy` - Dropped `ToLength` detection from array methods feature detection which could cause hanging FF11-21 and some versions of old WebKit, [#​764](https://togithub.com/zloirock/core-js/issues/764) - Minified bundle from `core-js-bundle` uses `terser` instead of `uglify-js`

---

Renovate configuration

:date: Schedule: "after 10pm every weekday,before 4am every weekday,every weekend" in timezone UTC.

:vertical_traffic_light: Automerge: Enabled.

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

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

---

• [ ] If you want to rebase/retry this PR, check this box

---

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