Update eslint to v4 (major)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@typescript-eslint/eslint-plugin	devDependencies	major	^3.9.1 -> ^4.0.0
@typescript-eslint/parser	devDependencies	major	^3.9.1 -> ^4.0.0

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Release Notes

typescript-eslint/typescript-eslint

v4.0.1

Compare Source

Bug Fixes

• eslint-plugin: update parser dependency range (#​2445) (2cb6620), closes #​2444

v4.0.0

Compare Source

Bug Fixes

• eslint-plugin: [no-shadow] fix false-positive on enum declaration (#​2374) (9de669f)
• eslint-plugin: [no-unused-vars] handle TSCallSignature (#​2336) (c70f54f)
• correct decorator traversal for AssignmentPattern (#​2375) (d738fa4)
• scope-manager: correct analysis of abstract class properties (#​2420) (cd84549)
• typescript-estree: correct ChainExpression interaction with parentheses and non-nulls (#​2380) (762bc99)

Features

• consume new scope analysis package (#​2039) (3be125d)
• support ESTree optional chaining representation (#​2308) (e9d2ab6)
• eslint-plugin: [ban-ts-comment] change default for ts-expect-error to allow-with-description (#​2351) (a3f163a), closes #​2146
• eslint-plugin: [no-unnecessary-condition][strict-boolean-expressions] add option to make the rules error on files without strictNullChecks turned on (#​2345) (9273441)
• eslint-plugin: [typedef] remove all defaults (#​2352) (a9cd6fb)
• eslint-plugin: add consistent-type-imports rule (#​2367) (58b1c2d)
• typescript-estree: switch to globby (#​2418) (3a7ec9b), closes #​2398

BREAKING CHANGES

• typescript-estree: - removes the ability to supply a RegExp to projectFolderIgnoreList, and changes the meaning of the string value from a regex to a glob.

• • Removed decorators property from several Nodes that could never semantically have them (FunctionDeclaration, TSEnumDeclaration, and TSInterfaceDeclaration)

• Removed AST_NODE_TYPES.Import. This is a minor breaking change as the node type that used this was removed ages ago.

• eslint-plugin: Default rule options is a breaking change.

3.10.1 (2020-08-25)

Bug Fixes

• eslint-plugin: [no-unnecessary-condition] correct regression with unary negations (#​2422) (d1f0887), closes #​2421

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