chore: update typescript-eslint monorepo to ^4.9.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@typescript-eslint/eslint-plugin	^4.8.2 -> ^4.9.0
@typescript-eslint/parser	^4.8.2 -> ^4.9.0

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Release Notes

typescript-eslint/typescript-eslint

v4.9.0

Compare Source

Bug Fixes

• eslint-plugin: [consistent-indexed-object-style] convert readonly index signature to readonly record (#​2798) (29428a4)
• eslint-plugin: [consistent-type-imports] crash when using both default and namespace in one import (#​2778) (c816b84)
• eslint-plugin: [explicit-module-boundary-types] ignore functions exported within typed object/array literals (#​2805) (73a63ee)
• eslint-plugin: [no-use-before-define] allow class references if they're within a class decorator (#​2827) (050023a), closes #​2842
• eslint-plugin: [triple-slash-reference] fix crash with external module reference (#​2788) (32b1b68)
• scope-manager: fix assertion assignments not being marked as write references (#​2809) (fa68492), closes #​2804
• typescript-estree: add default value for parserOptions.projectFolderIgnoreList and deduplicate resolved projects (#​2819) (bf904ec), closes #​2418 #​2814

Features

• eslint-plugin: [naming-convention] add requireDouble, allowDouble, allowSingleOrDouble options for underscores (#​2812) (dd0576a)
• eslint-plugin: [naming-convention] add requiresQuotes modifier (#​2813) (6fc8409), closes #​2761 #​1483
• eslint-plugin: [naming-convention] add modifier unused (#​2810) (6a06944)
• eslint-plugin: [naming-convention] add modifiers exported, global, and destructured (#​2808) (fb254a1), closes #​2239 #​2512 #​2318 #​2802
• eslint-plugin: [naming-convention] allow destructured modifier for parameter selector (#​2829) (525d2ff), closes #​2828
• eslint-plugin: [naming-convention] split property and method selectors into more granular classXXX, objectLiteralXXX, typeXXX (#​2807) (665b6d4), closes #​1477 #​2802
• eslint-plugin: [no-unused-vars] fork the base rule (#​2768) (a8227a6), closes #​2782 #​2714 #​2648
• eslint-plugin: [unbound-method] add support for methods with a this: void parameter (#​2796) (878dd4a)

4.8.2 (2020-11-23)

Bug Fixes

• eslint-plugin: [prefer-literal-enum-member] allow pure template literal strings (#​2786) (f3bf6a1)
• typescript-estree: fix type-only regression for consumers not yet on TS 4.1 (#​2789) (50a46c6)

4.8.1 (2020-11-17)

Bug Fixes

• eslint-plugin: [no-unnecessary-condition] false positive when array predicate returns unknown (#​2772) (111c244)
• typescript-estree: parseWithNodeMaps returning empty maps (#​2773) (3e4a0ed)

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