update paint

Author: DD Liu

package.json

@@ -107,7 +107,7 @@
     "scratch-audio": "0.1.0-prerelease.20190114210212",
     "scratch-l10n": "3.5.20190724160319",
     "scratch-blocks": "0.1.0-prerelease.1563990552",
-    "scratch-paint": "0.2.0-prerelease.20190724154115",
+    "scratch-paint": "0.2.0-prerelease.20190729153946",
     "scratch-render": "0.1.0-prerelease.20190605151415",
     "scratch-storage": "1.3.2",
     "scratch-svg-renderer": "0.2.0-prerelease.20190715153806",