Bump scratch-audio

Bumps [scratch-audio](https://github.com/LLK/scratch-audio) from 0.1.0-prerelease.20190925183642 to 0.1.0-prerelease.20200528195344.
- [Release notes](https://github.com/LLK/scratch-audio/releases)
- [Commits](https://github.com/LLK/scratch-audio/commits)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -107,7 +107,7 @@
     "redux-mock-store": "^1.2.3",
     "redux-throttle": "0.1.1",
     "rimraf": "^2.6.1",
-    "scratch-audio": "0.1.0-prerelease.20190925183642",
+    "scratch-audio": "0.1.0-prerelease.20200528195344",
     "scratch-blocks": "0.1.0-prerelease.20200526135421",
     "scratch-l10n": "3.9.20200528181319",
     "scratch-paint": "0.2.0-prerelease.20200519194740",