@Munter, we can think about whether to align with the prettier 2 defaults of trailingComma and arrowParens. In this first iteration I tried to keep the changes minimal.
Coverage remained the same at 77.573% when pulling 47f3a638566e845e6aa0094ef6969387aacbd86b on greenkeeper/prettier-2.0.1 into 78ff9a57c76d6970d99725f98897d0a843deb3de on master.
Closes #175