### GET Promotions [GET /promotion{?squadId,inProgress,fractFilter}]

List all promotion requests

+ Parameters
    + squadId (string, optional)
         specific squad Id to show the promotion requests for

    + inProgress (boolean, optional)
        true to filter by promotion state 'in progress'

        + Default: false

    + fractFilter (enum[string], optional)
        Field to filter by fraction

        + Members
            + `BLUFOR`
            + `OPFOR`
            + `GLOBAL`

+ Response 200

    + Attributes (array[Promotion])