Migrating causes null to now be generated as unknown

[henry-encord]

hey, I am migrating from version 0.48.2 to 0.66.4, and have it working fine except for one thing - null types are being replaced with unknown.

Here is an example of the types that have been changed:

// Old generated type
export type myEntity = {
  entityId: string;
  entityTitle: string | null;
};

// New generated type
export type myEntity = {
  entityId: string;
  entityTitle: string | unknown;
};

Right now it isn't feasible to go through the codebase and refactor to use unknown instead of null, is there a way I can get the types to generate how they used to (e.g. null instead of unknown).

This is the current config:

export default {
  input: "openapi.json",
  output: {
    format: "prettier",
    path: "lib",
  },
  plugins: [
    {
      name: "@hey-api/client-fetch",
      baseUrl: false,
      exportFromIndex: true,
    },
    {
      name: "@hey-api/sdk",
      asClass: true,
    },
    {
      name: "@hey-api/typescript",
      enums: "javascript",
    },
  ],
  schemas: false,
};

[henry-encord]

Fixed:

The solution to this is to use openapi 3.1.0+