Merge pull request #480 from JemiloII/patch-1

Use lodash size function

lib/scope.js

@@ -322,7 +322,7 @@ function define(nockDefs) {
     } else {
       nock = startScope(nscope, options);
       //  If request headers were specified filter by them.
-      if (reqheaders !== {}) {
+      if (_.size(reqheaders) > 0) {
         for (var k in reqheaders) {
           nock.matchHeader(k, reqheaders[k]);
         }