json_schema2 2.0.0+2

Provide support for validating instances against json schema

[2.0.0+2] - May 29th, 2021

• Static code analysis updates

[2.0.0+1] - April 30th, 2021

• Dependency updates

[2.0.0] - March 7th, 2021

• Null Safety
• Assistance requested if you have issues, the Null Safety conversion was big, and I tested as best as I could myself.

[1.0.0+1] - December 13th, 2020

• Updated dependencies

[1.0.0] - December 13th, 2020

• Initial release as fork from https://github.com/Workiva/json_schema to update outdated code / dependencies.