This is a pretty small update with just a few things fixed from v3.1.0.

Concise Package

• All of our Node.js dependencies have been updated so they work with the latest version (9f8bce3)
• We've made a few updates to our contributing guidelines (6f47ad7)
• [ref: #87] We have added the composer.json file back per a request from a Concise user. (4094dc0)

SASS

• Fixed a problem with the spacing variables, by moving the $base-unit variable (5352553)