Intercom\Companies\Requests\CreateOrUpdateCompanyRequest class is missing in version 5.0.2. But it is still in API doc so it is probably problem with generation.
https://developers.intercom.com/docs/references/rest-api/api.intercom.io/companies/createorupdatecompany
I am not a fan of this approach to API, at least some tests should be added so you know that everything is complete. This whole v5 generated API is clusterfuck