Bump to 3.0.6

[thedrick]

This bumps Lottie to 3.0.6 and also reformats the podspec file using a Ruby linter. Let me know I should revert that change

@buba447 @Coeur

[thedrick]

I verified that this builds correctly for iOS, MacOS, and TvOS using CocoaPods and Carthage

[Coeur]

Hello,
Yes, it builds and could be merged, but note that:

• I'm not a fan of the %w syntax, as it means our eyes have to read multiple syntaxes for the same thing (%w when array elements don't have any space, and classic single quotes for other arrays)
• The commit also introduces a mix of syntaxes between s.license and s.author: one uses symbol: value and the other uses key => value.
  Sure, overall we use less characters, but perhaps we shouldn't make it harder for Ruby neophytes.

[thedrick]

@Coeur sounds good to me, I'll revert those changes

[thedrick]

@Coeur updated!