title: Discord.py bot doesn't send keycap emojis
body: <p>I tried creating a simple menu system and used reactions as buttons in a bot. Problem is, every time I tried to send an emoji (numeric digit emojis, one for each command in the menu), Discord spits out an error: unknown emoji. Here's the method I am using:</p>
  
  <pre><code>async def show_buttons(embed_object, menu, message):
      emojis = ['1️⃣','2️⃣','3️⃣','4️⃣','5️⃣','6️⃣','7️⃣','8️⃣','9️⃣']
      human_user = message.author
      msg = await client.send_message(message.channel, embed=embed_object)
      for command, emoji in zip(game_engine.buttons[menu], emojis): 
          await client.add_reaction(msg, emoji)
      res = await client.wait_for_reaction(emojis, user=human_user, message=msg)
      await client.send_message(message.channel, '{0.user} reacted with {0.reaction.emoji}!'.format(res))
      ...REST OF CODE GOES HERE...
  </code></pre>
  
  <p><code>game_engine.buttons[menu]</code> is a list of commands that are labeled 1-9 and <code>embed_object</code> is the menu that is formatted in a specific way. </p>
  
  <p>It always returns the error: <code>discord.errors.HTTPException: BAD REQUEST (status code: 400): Unknown Emoji</code></p>
  
  <p>What do I do?</p>