Fix failing tests from jsonstream update

Author: zertosh

package.json

@@ -26,7 +26,7 @@
   "devDependencies": {
     "through": "~2.3.4",
     "tape": "~2.12.3",
-    "browser-pack": "~2.0.1"
+    "browser-pack": "^4.0.3"
   },
   "scripts": {
     "test": "tape test/*.js"

test/tr_write.js

@@ -24,7 +24,7 @@ test('transform write', function (t) {
     p.pipe(JSONStream.stringify()).pipe(pack);
 
     pack.pipe(concat(function (buf) {
-        var src = buf.toString('utf');
+        var src = buf.toString('utf8');
         Function('console', src)({ log: function (msg) {
             t.equal(msg, 'WORLD WIDE WOW');
         } });