[BUG][TypeScript] uniqueItems leads to an invalid Set.map call

[stewe]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

Issue #8695, providing Arrays instead of Sets, introduced an error. The parantheses are misplaced such that ".map(...)" is called on Set instead on Array.
Example output:

export function PlanUpdateToJSON(value?: PlanUpdate | null): any {
    if (value === undefined) {
        return undefined;
    }
    if (value === null) {
        return null;
    }
    return {
        'embeddedNodes': value.embeddedNodes === undefined ? undefined : (Array.from((value.embeddedNodes as Set<any>).map(NodeToJSON)))
    };
}

openapi-generator version

5.1.0

OpenAPI declaration file content or url

Generation Details

Steps to reproduce

Related issues/PRs

introduced by #8695

Suggest a fix

https://github.com/t-h-e/openapi-generator/blob/master/modules/openapi-generator/src/main/resources/typescript-fetch/modelGeneric.mustache

line 112

'{{baseName}}': {{^required}}value.{{name}} === undefined ? undefined : {{/required}}({{#isNullable}}value.{{name}} === null ? null : {{/isNullable}}Array.from(value.{{name}} as Set<any>).map({{#items}}{{datatype}}{{/items}}ToJSON)),