chore(package): update scratch-storage to version 1.3.1

Closes #4697

package.json

@@ -109,7 +109,7 @@
     "scratch-l10n": "3.1.20190328114324",
     "scratch-paint": "0.2.0-prerelease.20190318170811",
     "scratch-render": "0.1.0-prerelease.20190326161919",
-    "scratch-storage": "1.2.2",
+    "scratch-storage": "1.3.1",
     "scratch-svg-renderer": "0.2.0-prerelease.20190329052730",
     "scratch-vm": "0.2.0-prerelease.20190329172358",
     "selenium-webdriver": "3.6.0",