chore(package): update scratch-blocks to version 0.1.0-prerelease.1568071968

package.json

@@ -108,7 +108,7 @@
     "rimraf": "^2.6.1",
     "scratch-audio": "0.1.0-prerelease.20190114210212",
     "scratch-l10n": "3.5.20190827223456",
-    "scratch-blocks": "0.1.0-prerelease.1566984014",
+    "scratch-blocks": "0.1.0-prerelease.1568071968",
     "scratch-paint": "0.2.0-prerelease.20190822205009",
     "scratch-render": "0.1.0-prerelease.20190904212449",
     "scratch-storage": "1.3.2",