Update growl to 1.10.3

This avoid a warning about an eslint peerDependency on install:
```
[email protected] requires a peer of eslint@>=3.1.0 but none is installed.
```

package.json

@@ -311,7 +311,7 @@
     "diff": "3.3.1",
     "escape-string-regexp": "1.0.5",
     "glob": "7.1.2",
-    "growl": "1.10.2",
+    "growl": "1.10.3",
     "he": "1.1.1",
     "mkdirp": "0.5.1",
     "supports-color": "4.4.0"