Dependency and Scala Upgrades

[sankalpgambhir]

A small set of maintenance changes:

• updated sbt version
• updated Scala version
• updated sbt plugin versions
• slightly cleaned up sbt build
• expose lisa-sets main classes in the root project, so it does not simply fail with "No main class detected" when using sbt run in the root folder
• better multiline string handling rules for scalafmt