"pipeDelimeted" query parameter format generates invalid node-fetch code

Hi,

setting the style parameter of a query parameter to pipeDelimited generates invalid typescript-fetch code.

Example Property

- name: searchIn
    in: query
    description: Ids of the columns to search in
    required: true
    style: pipeDelimited
    explode: false
    schema:
    type: array
    items:
        type: integer

api.ts(7404,87): error TS2551: Property 'pipe' does not exist on type '{ csv: string; ssv: string; tsv: string; pipes: string; }'. Did you mean 'pipes'?

Generated code

This is the generated COLLECTION_FORMATS object:

/**
 *
 * @export
 */
export const COLLECTION_FORMATS = {
    csv: ",",
    ssv: " ",
    tsv: "\t",
    pipes: "|",
};

And this is the code that tries to access an invalid property of COLLECTION_FORMATS:

if (searchIn) {
    localVarQueryParameter['searchIn'] = searchIn.join(COLLECTION_FORMATS["pipe"]);
}

Locate the typescript-fetch generator templates responsible for COLLECTION_FORMATS and query serialization, then inspect how pipeDelimited is mapped and referenced. Generate code from the example schema and verify that the resulting TypeScript compiles without the invalid COLLECTION_FORMATS["pipe"] access.