dataclass v2.0.0

• Dataclass is now licensed under ISC License
  https://github.com/alexeyraspopov/dataclass/blob/master/LICENSE
• Breaking: the utility class has been renamed from Record to Data
  • "Record" now means a lot of other things in the ecosystem
• Breaking: use .create() static method instead of new operator
  • This fixes the issue with existing browser implementation of class properties
  • The use of new operator now throws a runtime error
• Breaking: TypeScript classes no longer need to be generic
• Breaking: an attempt to mutate properties now throws runtime errors
• Breaking: use named import instead of default import { Data } from "dataclass"
  • This should fix possible CJS/ESM compatibility issues and allow future API extensions
• Breaking: explicit toJSON() implementation has been removed, but the behavior is preserved
• Breaking: library code is no longer transpiled to ES5
  • Unless you support evergreen browsers, you still need to transpile TypeScript or class
    properties so the build step is inevitable. Thus, make sure dataclass is transpiled if
    necessary
• Fixed equals() algorithm to ensure proper custom values comparison
• Fixed equals() algorithm to avoid runtime errors for nullable properties
• Added sideEffects: false to package.json