update composer.json

Laravel 5.5+ package auto discovery

adding LavaLoader to get around manually requiring files in the lavacharts class. Enabling the use of the library outside of composer. #227

3e19f8f [ci skip] build both dev and prod builds with the default gulp cmd

git-subtree-dir: lavajs
git-subtree-split: 3e19f8ffc73148c6a87c94053aaa309c32531168

git-subtree-dir: lavajs
git-subtree-split: 8d3156ca7b984ab501f7e015b87cb3943224e159

[ci skip] Chart JSON object no longer needs to define the class property. It will be mapped from the chart type