Change Log

• add polymorphic object type

Note this bumps the json schema version to the latest (2020). This will break the app package because fastify by default uses the older v7 json schema draft (in part because it's faster). That can be worked around as follows (this allows turns off type coercion for body elements because they should not need coercion, they should come with the correct types... but maybe some clients have been getting away with sending strings instead of the correct type so it'd be more backwards compatible to leave type coercion on for body too):

import Ajv from 'ajv/dist/2020'
...
const ajvObjs = {
  coerceTypes: new Ajv({ ...ajvParams, coerceTypes: true }),
  noCoerceTypes: new Ajv({ ...ajvParams, coerceTypes: false })
}
const app = fastify({...})
    .setValidatorCompiler(({ httpPart, schema }) => {
      // header, route, and query string always come as strings; coerce them
      // to the correct types if possible; body should come exactly in the
      // right type so don't allow type coercion there
      const useCoerce = httpPart !== 'body'
      const ajv = useCoerce ? ajvObjs.coerceTypes : ajvObjs.noCoerceTypes
      const validate = ajv.compile(schema)
      return (value) => !validate(value)
        ? ({ value, error: validate.errors })
        : ({ value })
    })   

Checklist

• I confirm there is no private key, token, secret, etc. added in this pull request or any intermediate commits, as they will become publicly accessible and result in security breach.
• By submitting this pull request to Pocket Gems' Github repository, I confirm that Pocket Gems can use, modify, copy and redistribute my contribution, under the terms of Pocket Gems' choice, which as of date of this submission, shall be the Apache License Version 2.0, and may be changed at any time at Pocket Gems' sole discretion.