How to Automatically Number List in Markdown

I've been using Markdown for quite some time, but this little trick never found a way to me, until now.

Instead of manually numbering list in Markdown, you can use 1. everywhere and it will increase next item automatically.

1. Item 1
1. Item 2
1. Item 3

will output

  1. Item 1
  2. Item 2
  3. Item 3