Merge pull request #4517 from LLK/greenkeeper/scratch-blocks-0.1.0-prerelease.1549643185

Update scratch-blocks to the latest version 

package.json

@@ -104,7 +104,7 @@
     "redux-throttle": "0.1.1",
     "rimraf": "^2.6.1",
     "scratch-audio": "0.1.0-prerelease.20190114210212",
-    "scratch-blocks": "0.1.0-prerelease.1549534784",
+    "scratch-blocks": "0.1.0-prerelease.1549643185",
     "scratch-l10n": "3.1.20190207224638",
     "scratch-paint": "0.2.0-prerelease.20190114205252",
     "scratch-render": "0.1.0-prerelease.20190208165820",