chore(package): update scratch-blocks to version 0.1.0-prerelease.1513908877

package.json

@@ -86,7 +86,7 @@
     "redux-throttle": "0.1.1",
     "rimraf": "^2.6.1",
     "scratch-audio": "0.1.0-prerelease.1513803406",
-    "scratch-blocks": "0.1.0-prerelease.1513872749",
+    "scratch-blocks": "0.1.0-prerelease.1513908877",
     "scratch-l10n": "2.0.20171211145754",
     "scratch-paint": "0.1.0-prerelease.20171220165922",
     "scratch-render": "0.1.0-prerelease.1513807417",