fix: Deterministic sorting of search results. (#343)

* Deterministic sorting of search results.

This is important for reliable tests, e.g. if you are snapshotting views
and comparing to reference images.

* fix prettier

src/utils/emoji-index/nimble-emoji-index.js

@@ -181,7 +181,11 @@ export default class NimbleEmojiIndex {
                 var aScore = scores[a.id],
                   bScore = scores[b.id]
 
-                return aScore - bScore
+                if (aScore == bScore) {
+                  return a.id.localeCompare(b.id)
+                } else {
+                  return aScore - bScore
+                }
               })
             }