Remove cats from initial libraryDependencies.

[mtgto]

This template is used in Getting started with scala and sbt at scala-lang.org.
Cats is unnecessary for beginner.

[kmizu]

@Philippus @travissarles How do you think about this pull request ? I agree with @mtgto 's opinion.

[SethTisue]

note that https://docs.scala-lang.org/getting-started-sbt-track/getting-started-with-scala-and-sbt-on-the-command-line.html uses scala-parser-combinators as a sample dependency

[SethTisue]

so I would suggest substituting that, to keep this repo aligned with the web page. note that cats is also mentioned in a subsequent comment, so that needs updating as well

[SethTisue]

anyone interested in adopting this apparently abandoned PR?

[bjornregnell]

@SethTisue Is there anything I can do to help getting this merged?

[SethTisue]

I don't think it's mergeable in its current form, as per my comments above. Happy to merge either this PR, if it is updated, or a replacement PR.

[mtgto]

@SethTisue I update to use scala-parser-combinators instead of cats.

[SethTisue]

thank you!