Add indent option

[yaodingyd]

Fix #23

One more try!

[sindresorhus]

Can you add it to https://github.com/sindresorhus/ora/blob/master/example.js to show it off in action?

[sindresorhus]

Can you also allow changing the indent while Ora is running? Similar to how it's done in #95. Just add a public getter/setter and also validate that indent is an integer from 0 and up.

[sindresorhus]

Can you also document the indent property?

[yaodingyd]

What other documentation is needed? I already added it in the README. So I need to expand on that?

[sindresorhus]

Right now it's documented as an option, but it needs to be documented as a property too. Here: https://github.com/sindresorhus/ora#color-1

[sindresorhus]

Looks good :)

[sindresorhus]

You need to submit the PR URL to IssueHunt to claim the bounty. You can do this already when you open the PR. You don't have to wait until it's merged ;)