How to merge two tables in Lua?

local function loopMethod(dict1, dict2)
    local merged_dict = {}
    for k, v in pairs(dict1) do
        merged_dict[k] = {}
        table.insert(merged_dict[k], v)
    end
    for k, v in pairs(dict2) do
        merged_dict[k] = merged_dict[k] or {}
        table.insert(merged_dict[k], v)
    end
    return merged_dict
end