fix(package): update unfetch to version 2.1.1 (#1298)

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -79,7 +79,7 @@
     "strip-ansi": "3.0.1",
     "styled-jsx": "0.5.7",
     "touch": "1.0.0",
-    "unfetch": "2.1.0",
+    "unfetch": "2.1.1",
     "url": "0.11.0",
     "uuid": "3.0.1",
     "webpack": "2.2.1",