Prefer single quotes

[sphilee]

1. More JavaScript teams do this (e.g. airbnb, standard, npm, node, google/angular, facebook/react, prettier).
2. It's easier to type (no shift needed on most keyboards).
3. Allows easier write html within javascript
4. Single quotes can often look better when you're using them to represent an empty string '' vs "" (too many little marks in the latter and can be difficult read)