Move "regional" category to after "flags"

Otherwise by default it appears first, pushing "people" further down the list

Also, remove "unicode9" category ordering, as this category does not exist as part of emojione

src/autocomplete/EmojiProvider.js

@@ -35,8 +35,8 @@ const CATEGORY_ORDER = [
     'nature',
     'travel',
     'flags',
+    'regional',
     'symbols',
-    'unicode9',
     'modifier',
 ];