slate-tools ships with Eslint 4 but references Eslint 5 definitions

[magnuspaaske]

Slate depends on eslint@^4.12.0 but the eslint slate config references some settings that were only introduced in version 5 (prefer-object-spread) and version 5.3 (no-misleading-character-class and require-atomic-updates).

The best way to solve this would probably be to update the requirement to eslint@^5.3.0 for slate-tools

[t-kelly]

Good catch! Thanks @magnuspaaske.

[tanhengyeow]

Hi @t-kelly

I'm a new contributor for Shopify and would love to be assigned this issue 😄

[t-kelly]

@tanhengyeow thanks for volunteering. Open a PR and let's get this fixed!