TokenMetadata client missing fetchApi config

[kyranjamie]

The auto-generated JS API client doesn't support a custom fetchApi for the @hirosystems/token-metadata-api-client, as it does with the other APIs.

e.g.

// node_modules/@hirosystems/token-metadata-api-client/dist/configuration.d.ts
export interface ConfigurationParameters {
    apiKey?: string | ((name: string) => string);
    username?: string;
    password?: string;
    accessToken?: string | ((name: string, scopes?: string[]) => string);
    basePath?: string;
}

vs other packages in @stacks/blockchain-api-client which do support the fetchApi argument in their Configuration.

Being unable to override the fetch function prohibits clients from being able to monitor and modify requests, e.g. to add API key headers etc.