@typescript-eslint/eslint-plugin-tslint update peerDependency to support recently released eslint@7.0.0

[nickharris]

Repro
eslint 7 was recently released https://www.npmjs.com/package/eslint/v/7.0.0 you take a peer dependency on 5 and 6 only.

1. update to the new eslint@7.0.0 npm install --save eslint@7.0.0
2. npm install @typescript-eslint/eslint-plugin-tslint@2.32.0
3. Get error > npm WARN @typescript-eslint/eslint-plugin-tslint@2.32.0 requires a peer of eslint@^5.0.0 || ^6.0.0 but none is installed. You must install peer dependencies yourself.

looks like package.json peerDepenencies needs to be updated to add || ^7.0.0 for eslint.

Expected Result
no warning on install
Actual Result
npm WARN @typescript-eslint/eslint-plugin-tslint@2.32.0 requires a peer of eslint@^5.0.0 || ^6.0.0 but none is installed. You must install peer dependencies yourself.

Additional Info
looks like package.json peerDepenencies needs to be updated to add || ^7.0.0 for newly released eslint 7 https://www.npmjs.com/package/eslint/v/7.0.0

Versions

package	version
@typescript-eslint/eslint-plugin-tslint	^2.32.0
@typescript-eslint/parser	^2.32.0
TypeScript	3.5.3
ESLint	7.0.0
node	12.13.0
npm	6.13.6

[bradzacher]

See #1550