Plasma-Toolkit v1.1.0

• Updated to AppKit 6.0.0 with proper dependency
• Updated Scala to 2.12.20
• Added support for InsertOrUpdate operation
• Changed leveldbjni dependency to help with building from source
• Added PlasmaMap.empty for creating default empty PlasmaMaps using Array[Byte] Key & Value types, PlasmaParameters.default params, and given AvlTreeFlags (Is AllOperationsAllowed by default)
• Changed PlasmaMap.copy to call prover.generateProof before returning new deep copy. This prevents proof divergence when performing operations on identical maps.
• Added usage section to README

To use Plasma-Toolkit in your project, add the following to your build.sbt:

libraryDependencies += "io.github.k-singh" %% "plasma-toolkit" % "1.1.0"