v2.0.0

Release to fix limitations I faced developing rescript-envsafe. Shouldn't be breaking for most users.

• Add S.Int.port built-in refinement
• Rename action type to migration. Still don't like the name though 😅
• Add advanced preprocessing functionality, might be useful when you build sometimes on top of rescript-struct
• Remove [ReScript Struct] prefix from error message created by S.Error.toString
• Remove custom error RescriptStructError for panic and throw normal Errors with [rescript-struct] prefix in message
• Fix matching of Literal in the tagged type. I mentioned the problem in the form post
• Fix Defaulted and Json structs with parseAsyncInStepsWith. They will synchronously return error that happened before asynchronous operation
• The Json struct factory is more performant and creates structs with Json name instead of String
• Creating structs became 20% faster. Now to create a struct and parse is just a little slower than only parsing for zod
• Add rescript-envsafe to the ecosystem of rescript-struct
• Update LICENSE copyright