Use object shorthand for properties

[LinusU]

This rule is on its way into the latest Standard ☺️

ref: https://github.com/standard/eslint-config-standard/pull/166

Compatibility: This syntax works on Node.js 4.0 and up, this module currently requires Node.js 6.0 and up (see #166 for details) ✅

[LinusU]

@alanshaw any thoughts on merging this? ☺️