fix(reporter): Add adapters property for 0.13 compat.

Add an `adapters` property to the reporter for compatibility with latest
Karma 0.13 release.

lib/sauce_reporter.js

@@ -7,6 +7,8 @@ var SauceReporter = function (logger, /* sauce:jobMapping */ jobMapping) {
   var pendingUpdates = 0
   var updatesFinished = function () {}
 
+  this.adapters = []
+
   // We're only interested in the final results per browser
   this.onBrowserComplete = function (browser) {
     var result = browser.lastResult