Merge pull request #1804 from LLK/greenkeeper/scratch-audio-0.1.0-prerelease.1523977528

Update scratch-audio to the latest version 

package.json

@@ -88,7 +88,7 @@
     "redux-mock-store": "^1.2.3",
     "redux-throttle": "0.1.1",
     "rimraf": "^2.6.1",
-    "scratch-audio": "0.1.0-prerelease.1516198804",
+    "scratch-audio": "0.1.0-prerelease.1523977528",
     "scratch-blocks": "0.1.0-prerelease.1524267558",
     "scratch-l10n": "2.0.20180108132626",
     "scratch-paint": "0.2.0-prerelease.20180423143518",