Fix needed for "ArgumentError: The request is in a bad format" #65

ArgumentError: The request is in a bad format:
Dict{String, Any}("day" => ["16"], "month" => ["12"], "time" => ["00:00", "01:00", "02:00", "03:00", "04:00", "05:00",
"06:00", "07:00", "08:00", "09:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00", "17:00", "18:00",
"19:00", "20:00", "21:00", "22:00", "23:00"], "year" => ["2004"], "pressure_level" => ["1000", "975", "950", "925",
"900", "875", "850", "825", "800", "775", "750", "700", "650", "600", "550", "500", "450", "400", "350", "300", "250"],
"area" => [18.5, -62.5, 17.0, -61.0], "product_type" => ["reanalysis"], "data_format" => "netcdf", "variable" =>
["geopotential"])

["PRIVATE-TOKEN" => key, "Content-Type" => "application/json"],