package.json: Simplified "npm run travis" so it relies on "npm run coverage".
package.json: Simplified "npm run travis" so it relies on "npm run coverage".

papandreou/assetgraph,papandreou/assetgraph,assetgraph/assetgraph,papandreou/assetgraph,jscinoz/assetgraph,jscinoz/assetgraph,jscinoz/assetgraph