Parentheses around single parameter arrow functions / Add support for arrow-parens property

Hey !

It will be great to add an option to disable auto remove of parenthesis when there is only one argument in an arrow function. Most of professional projects configure their way since it’s the default eslint behaviour. Here is a Eslint Link : http://eslint.org/docs/rules/arrow-parens

// Bad
a => {}

// Good
(a) => {}

[rattrayalex]

Prefer Option 5: An --arrow-parens flag with options always, never, and block (or something like that).

[rattrayalex]

Prefer Option 2: Adopt airbnb’s behavior (no-parens for implicit-return arrows only)