[Infrastructure]: The latest build 4.0.0-dev.20200520 breaks @typescript-eslint/parser

[a-tarasyuk]

Linting: node_modules/eslint/bin/eslint --cache --cache-location scripts/.eslintcache --format autolinkable-stylish --rulesdir scripts/eslint/built/rules --ext .ts scripts
> /.nvm/versions/node/v12.16.1/bin/node node_modules/eslint/bin/eslint --cache --cache-location scripts/.eslintcache --format autolinkable-stylish --rulesdir scripts/eslint/built/rules --ext .ts scripts
/TypeScript/scripts/eslint/rules/only-arrow-functions.ts
Error: /TypeScript/scripts/eslint/rules/only-arrow-functions.ts  Parsing error: Cannot read property 'map' of undefined

Example 1

Example 2

It seems this issue related to some of the changes in public API. In this repo, @typescript-eslint uses the latest version of typescript. However, the next version has changes that have not supported by @typescript-eslint yet.

TypeScript/package.json

Line 99 in 5f597e6

"typescript": "next",

Can we use the stable version of the TypeScipt in dependencies?

cc @DanielRosenwasser @RyanCavanaugh @weswigham @sandersn @orta

[weswigham]

We should probably fix the version, at least till we update eslint to handle labeled tuple elements.