Make JsonSerialization Case Insensitive

[taooceros]

Discussed in #546

^{Originally posted by taooceros July 3, 2021}
Should we make JsonSerialization Case Insensitive for JsonRpcPlugin?

Currently, there are two naming policy for our python plugin. The outer response model is camel case, but the inner Result (JsonRPCResult which extends the Result class) is Pascal Case (first letter Upper). Should we mark all camel case or simply use Case Insensitive.

Any thought? @Flow-Launcher/team