fix(package): update source-map-support to version 0.4.15 (vercel#1826)

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -82,7 +82,7 @@
     "prop-types": "15.5.7",
     "react-hot-loader": "3.0.0-beta.6",
     "send": "0.15.2",
-    "source-map-support": "0.4.14",
+    "source-map-support": "0.4.15",
     "strip-ansi": "3.0.1",
     "styled-jsx": "0.5.7",
     "touch": "1.0.0",