chore(package): update scratch-paint to version 0.2.0-prerelease.20180423143518

package.json

@@ -91,7 +91,7 @@
     "scratch-audio": "0.1.0-prerelease.1516198804",
     "scratch-blocks": "0.1.0-prerelease.1524163302",
     "scratch-l10n": "2.0.20180108132626",
-    "scratch-paint": "0.2.0-prerelease.20180420154430",
+    "scratch-paint": "0.2.0-prerelease.20180423143518",
     "scratch-render": "0.1.0-prerelease.1523453612",
     "scratch-storage": "0.4.0",
     "scratch-vm": "0.1.0-prerelease.1524254811",