Manifest jars on Windows

Previously, sbt-native-image would fail with an "argument list too long" error on Window for projects with a large classpath. Now, thanks to contribution #31 by @DaniRey, sbt-native-image uses manifest jars on Windows similarly to macOS and Linux.

Pull Requests

• Enable Scalafix and Scalafmt (#32) @olafurpg
• Bump olafurpg/setup-scala from 10 to 11 (#30) @dependabot
• Use manifest on Windows (#31) @DaniRey
• Update version in readme to latest (#25) @parched