GitHub activity widget relies on json.lua

[Ryuno-Ki]

I switched my Linux distro recently and am back to Awesome WM.

As such, I am reapplying these awesome widgets.
I discovered, that GitHub Activity Widget depends on JSON:

awesome-wm-widgets/github-activity-widget/github-activity-widget.lua

Line 13 in 8439ca7

local json = require("json")

However, this is not part of the Lua standard library.
Instead, json.lua needs to be downloaded: https://github.com/streetturtle/awesome-wm-widgets/tree/master/weather-widget#installation

(I cloned the repo and symlinked the file within (with the same name) which also worked).

Can you update the documentation?