Add sourcemaps support

package.json

@@ -41,6 +41,7 @@
     "lodash": "^4.0.0",
     "ncp": "^2.0.0",
     "request": "^2.67.0",
+    "source-map-support": "^0.4.0",
     "tmp": "0.0.28",
     "validator": "^4.5.0"
   },

src/cli.js

@@ -1,5 +1,7 @@
 #! /usr/bin/env node
 
+import 'source-map-support/register';
+
 import path from 'path';
 import program from 'commander';
 import buildApp from './buildApp';

src/index.js

@@ -1,3 +1,5 @@
+import 'source-map-support/register';
+
 import buildApp from './buildApp';
 
 export default buildApp;