Avoid of using Buffer.new (#3), bump deps, fix a case when data is empty

.travis.yml

@@ -1,9 +1,7 @@
 sudo: false
 language: node_js
-branches:
-  except:
-  - gh-pages
 node_js:
+  - '9'
   - '8'
   - '7'
   - '6'

index.js

@@ -1,6 +1,7 @@
 'use strict';
 
 var validDataUrl = require('valid-data-url');
+var NODE_MAJOR_VERSION = parseInt(process.version.slice(1), 10);
 
 module.exports = function (s) {
   var parts;
@@ -10,7 +11,7 @@ module.exports = function (s) {
     return false;
   }
 
-  parts = s.match(validDataUrl.regex);
+  parts = s.trim().match(validDataUrl.regex);
   parsed = {};
 
   if (parts[1]) {
@@ -23,12 +24,17 @@ module.exports = function (s) {
 
   parsed.base64 = !!parts[3];
 
-  if (parts[4]) {
-    parsed.data = parts[4];
-  }
+  parsed.data = parts[4] || '';
+
+  parsed.toBuffer = function () {
+    // new Buffer(string[, encoding]) is deprecated since: v6.0.0
+    // https://nodejs.org/docs/latest-v6.x/api/buffer.html#buffer_new_buffer_string_encoding
+
+    var encoding = parsed.base64 ? 'base64' : 'utf8';
 
-  parsed.toBuffer = function() {
-    return new Buffer(parsed.data, parsed.base64 ? 'base64' : 'utf8');
+    return NODE_MAJOR_VERSION >= 6 ?
+      Buffer.from(parsed.data, encoding) :
+      new Buffer(parsed.data, encoding);
   };
 
   return parsed;