fix: utils.has_value method always return false

[fengjx]

local prefix_v3 = {
    ["3.5."] = "/v3",
    ["3.4."] = "/v3",
    ["3.3."] = "/v3beta",
    ["3.2."] = "/v3alpha",
}

function _M.has_value(arr, val)
    for index, value in ipairs(arr) do
        if value == val then
            return index
        end
    end

    return false
end

prefix_v3 length is 0, so has_value method always return false

[claassistantio]

All committers have signed the CLA.

[membphis]

code style: this 4 space is useless, please remove it.

[membphis]

LGTM, we can merge it later

[fengjx]

another commit fix: #50

[membphis]

@fengjx merged, many thx