AutoTag 4.0.0

Changelog:

• Add support for alternate episode orderings (#20 - thanks @Tyr3al!)
• Migrate to Spectre.Console.Cli (fix #19)
• Significant refactoring to use dependency injection and add unit testing

🚨 Breaking Changes 🚨

There is a breaking change to the --replace option. The option values now must be separated with an equals (=) instead of a space.

For example, --replace a b must now be changed to --replace a=b.