Merge pull request #3600 from LLK/greenkeeper/scratch-storage-1.2.0

Update scratch-storage to the latest version 🚀

package.json

@@ -104,7 +104,7 @@
     "scratch-l10n": "3.0.20181031234255",
     "scratch-paint": "0.2.0-prerelease.20181105210331",
     "scratch-render": "0.1.0-prerelease.20181102130522",
-    "scratch-storage": "1.1.0",
+    "scratch-storage": "1.2.0",
     "scratch-svg-renderer": "0.2.0-prerelease.20181101210634",
     "scratch-vm": "0.2.0-prerelease.20181107153250",
     "selenium-webdriver": "3.6.0",