title: NameError: name 'Option' is not defined
body: <p>I'm writing a discord bot via py-cord and I get NameError: name 'Option' is not defined.
  Using pre-release version. Extensions are added.</p>
  <p>Code:</p>
  <pre><code>import discord
  from discord.ext import commands
  
  bot = discord.Bot()
  
  @bot.slash_command(guild_ids=[...])
  async def hello(
      ctx: discord.ApplicationContext,
      name: Option(str, &quot;Enter your name&quot;),
      age: Option(int, &quot;Enter your age&quot;, min_value=1, max_value=99, default=18)
      # passing the default value makes an argument optional
      # you also can create optional argument using:
      # age: Option(int, &quot;Enter your age&quot;) = 18
  ):
      await ctx.respond(f&quot;Hello! Your name is {name} and you are {age} years old.&quot;)
  
  bot.run('real token is here')
  </code></pre>