I'll deprecate rescript-json-schema

In the latest Sury release I added S.fromJSONSchema and made Sury support all rescript-json-schema API. So I’m going to deprecate it soon. If you need JSON Schema in ReScript, please use sury instead. It comes with JSONSchema.res module and a convenient way to build a schema. If you don’t run a parser, it also works without eval/new Function calls.