[refactor minor] Use JSON.parse when getting version

Author: mmalecki

lib/vows.js

@@ -187,5 +187,6 @@ vows.describe = function (subject) {
 };
 
 
-vows.version = require('fs').readFileSync(path.join(__dirname, '..', 'package.json'))
-                            .toString().match(/"version"\s*:\s*"([\d.]+)"/)[1];
+vows.version = JSON.parse(require('fs')
+                          .readFileSync(path.join(__dirname, '..', 'package.json')))
+                          .version