Update typescript-eslint monorepo to v4.8.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@typescript-eslint/eslint-plugin	4.8.0 -> 4.8.1
@typescript-eslint/parser	4.8.0 -> 4.8.1

---

Release Notes

typescript-eslint/typescript-eslint

### [`v4.8.1`](https://togithub.com/typescript-eslint/typescript-eslint/blob/master/CHANGELOG.md#​481-httpsgithubcomtypescript-eslinttypescript-eslintcomparev480v481-2020-11-17) [Compare Source](https://togithub.com/typescript-eslint/typescript-eslint/compare/v4.8.0...v4.8.1) ##### Bug Fixes - **eslint-plugin:** [no-unnecessary-condition] false positive when array predicate returns unknown ([#​2772](https://togithub.com/typescript-eslint/typescript-eslint/issues/2772)) ([111c244](https://togithub.com/typescript-eslint/typescript-eslint/commit/111c244c3eb157efeb5c43ff39f12633b27f091e)) - **typescript-estree:** parseWithNodeMaps returning empty maps ([#​2773](https://togithub.com/typescript-eslint/typescript-eslint/issues/2773)) ([3e4a0ed](https://togithub.com/typescript-eslint/typescript-eslint/commit/3e4a0ed0d615fd22a2f28c7c8af6179673e195f8))

---

Renovate configuration

:date: Schedule: At any time (no schedule defined).

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

: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 these updates 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.