fix(lint): Expect single quotes (#339)
fix(lint): Expect single quotes (#339)

## What does this PR do / solve?

This problem on codacy (https://app.codacy.com/gh/openwhyd/openwhyd/pullRequest?prid=6070209):

![image](https://user-images.githubusercontent.com/531781/91229059-905e5c80-e729-11ea-9e6e-78b401766004.png)

## Overview of changes

- add a rule in ESLint's config, on top of Prettier's (https://stackoverflow.com/a/29312958/592254)

openwhyd/openwhyd,openwhyd/openwhyd,openwhyd/openwhyd,openwhyd/openwhyd,openwhyd/openwhyd