add support multiple item returning query

data:
  Post.enum 1, blog_id: 1
  Post.enum 2, blog_id: 2
  Post.enum 3, blog_id: 2

old:
  Post.find(blog_id: 2) #=> Post<#id:2>

new:
  Post.find(blog_id: 2) #=> [Post<#id:2>, Post<#id:3>]
 bump up version 0.1.3