Run the build as an npm project

1. Give the build project a package.json with all of its deps
2. Install the dependencies in the build folder
3. Run the build

Closes #282

Author: m-mujica

.npmrc

@@ -0,0 +1 @@
+package-lock=false

.travis.yml

@@ -1,6 +1,5 @@
 language: node_js
 node_js:
-- 4
 - 6
 - 8
 script: npm test