Merge pull request #164 from syokenz/fix-categories-sort-compare-function

fix Categories sort compareFunction return to -1 from 0 in Picker component

src/components/picker.js

@@ -71,7 +71,7 @@ export default class Picker extends React.PureComponent {
           return 1
         }
 
-        return 0
+        return -1
       })
     }