Merge pull request #1539 from LLK/greenkeeper/scratch-paint-0.2.0-prerelease.20180302152015

Update scratch-paint to the latest version 

package.json

@@ -91,7 +91,7 @@
     "scratch-audio": "0.1.0-prerelease.1516198804",
     "scratch-blocks": "0.1.0-prerelease.1519256473",
     "scratch-l10n": "2.0.20180108132626",
-    "scratch-paint": "0.2.0-prerelease.20180227161624",
+    "scratch-paint": "0.2.0-prerelease.20180302152015",
     "scratch-render": "0.1.0-prerelease.1516837442",
     "scratch-storage": "0.4.0",
     "scratch-vm": "0.1.0-prerelease.1519681201-prerelease.1519681262",