chore(package): update scratch-paint to version 0.2.0-prerelease.20180605153807

Closes #1949

package.json

@@ -93,7 +93,7 @@
     "scratch-audio": "0.1.0-prerelease.1527803318",
     "scratch-blocks": "0.1.0-prerelease.1527865144",
     "scratch-l10n": "3.0.20180604162003",
-    "scratch-paint": "0.2.0-prerelease.20180531225024",
+    "scratch-paint": "0.2.0-prerelease.20180605153807",
     "scratch-render": "0.1.0-prerelease.20180605145739",
     "scratch-storage": "0.5.0",
     "scratch-vm": "0.1.0-prerelease.1527875455",