table index is nil

[subnetmarco]

When executing this code:

local Mediator = require("mediator")()

Mediator:subscribe("hello", function(data) print(data) end)

I have this issue:

usr/local/share/lua/5.1/mediator.lua:72: table index is nil
stack traceback:
    /usr/local/share/lua/5.1/mediator.lua:72: in function 'addChannel'
    /usr/local/share/lua/5.1/mediator.lua:81: in function 'getChannel'
    /usr/local/share/lua/5.1/mediator.lua:135: in function 'getChannel'
    /usr/local/share/lua/5.1/mediator.lua:142: in function 'subscribe'
    test.lua:3: in main chunk
    [C]: ?

With version 1.1.2-0 installed from LuaRocks.

[subnetmarco]

So it works when enclosing the channel name into a list, like:

Mediator:subscribe({"hello"}, function(data) print(data) end)

It would be nice if the code could also handle a plain string, because it seems like more intuitive to use.