automatically open webdash url on serve

package.json

@@ -12,6 +12,7 @@
     "filehound": "^1.16.2",
     "is-global": "^0.1.0",
     "lodash": "^4.17.0",
+    "opn": "^5.3.0",
     "ora": "^2.0.0",
     "pkg-dir": "^2.0.0",
     "resize-observer-polyfill": "^1.5.0",

scripts/index.js

@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 const chalk = require('chalk');
-
+const opn = require('opn')
 require('./checks');
 
 const serveOptions = yargs => {
@@ -23,6 +23,7 @@ const serveCommand = argv => {
     const url = chalk.underline(`http://${host}:${port}`);
     const message = chalk.keyword('green').bold(`Webdash running on ${url}!`);
     console.log(message);
+    opn(url)
   });
 };