Query parameters serialization is broken in generated API client

[prog13]

Hi team!

I believe that PR #223 has introduced a regression to the generated API query parameters serialization. The issue is in this template:

protected toQueryString(rawQuery?: QueryParamsType): string {
    const query = rawQuery || {};
    const keys = Object.keys(query).filter((key) => "undefined" !== typeof query[key]);
    return keys
            .map((key) =>
                typeof query[key] === "object" && !Array.isArray(query[key])
                ? this.toQueryString(query[key] as QueryParamsType)
                : this.addArrayQueryParam(query, key),
            )
            .join("&");
}

Condition typeof query[key] === "object" && !Array.isArray(query[key]) incorrectly handles primitive types: if type of query[key] is, for example, number, it will be handled by the this.addArrayQueryParam method, which is incorrect, and will throw an exception further on this line:

private addArrayQueryParam(query: QueryParamsType, key: string) {
    const value = query[key];
    const encodedKey = encodeURIComponent(key);
    return `${value.map((val: any) => `${encodedKey}=${encodeURIComponent(typeof val === "number" ? val : `${val}`)}`).join('&')}`;
}

Since type of value is number, obviously it's doesn't have .map method and the code will break.

[prog13]

I've opened the MR #229, hope I've got it right 🤞

[js2me]

Hello @prog13 !
Thanks for your contribution, fix of this bug was added in 8.0.3