Update support for Unicode 15.1

Upgrade to start using Unicode 15.1 emojis. Note that while 16.0 was just released, noto-emoji doesn't yet support it. Various things start breaking without the proper fallback images, and it's better to wait until 16 is a little more prevalent.

• load the Unicode emoji-test.txt file as the main basis for emoji data
• load the gemojione data, adding as aliases
• load any additional aliases

Closes #28 (closed)

lib/tanuki_emoji/db/emoji_test_parser.rb

@@ -74,37 +74,26 @@ module TanukiEmoji
             alpha_code = I18n.transliterate(emoji_data.description).gsub(/[^a-zA-Z#*\d]+/, '_').downcase
           end
 
-          emoji = @index.find_by_codepoints(emoji_data.codepoints)
+          # This might be a different qualified version, basically same emoji but slightly different
+          # codepoint. Search on the alpha code and pull that. If found, add as alternate codepoint.
+          # "smiling face" is one example.
+          emoji = @index.find_by_alpha_code(alpha_code)
 
           if emoji
-            if emoji.alpha_code != alpha_code
-              # code might have been renamed, add as an alias
-              emoji.add_alias(alpha_code)
+            emoji.add_codepoints(emoji_data.codepoints)
 
-              @index.update(emoji)
-            end
+            @index.update(emoji)
           else
-            # This might be a different qualified version, basically same emoji but slightly different
-            # codepoint. Search on the alpha code and pull that. If found, add as alternate codepoint.
-            # "smiling face" is one example.
-            emoji = @index.find_by_alpha_code(alpha_code)
-
-            if emoji
-              emoji.add_codepoints(emoji_data.codepoints)
-
-              @index.update(emoji)
-            else
-              # not found, add a new emoji
-              emoji = Character.new(alpha_code,
-                                    codepoints: emoji_data.codepoints,
-                                    alpha_code: alpha_code,
-                                    description: emoji_data.description,
-                                    category: emoji_data.group_category)
-
-              emoji.unicode_version = emoji_data.version
-
-              @index.add(emoji)
-            end
+            # not found, add a new emoji
+            emoji = Character.new(alpha_code,
+                                  codepoints: emoji_data.codepoints,
+                                  alpha_code: alpha_code,
+                                  description: emoji_data.description,
+                                  category: emoji_data.group_category)
+
+            emoji.unicode_version = emoji_data.version
+
+            @index.add(emoji)
           end
         end
       end