"Author" tag not formatted correctly in plugin.yml

Hello,

While investigating why "AutoPlug" couldn't update your plugin, I noticed in your plugin.yml that the "Author" tag is formatted incorrectly.

Current:
```
author:
  Zombie_Striker
```
Correct:
```
author: Zombie_Striker
```

I hope you'll be able to throw this in the next update you push out.
Thanks for a fantastically useful plugin!