This version of MicroQiskit is compatible with Lua 5.x and PICO-8 Lua.
Dowloading a single file is all that is needed, so the word 'installation' is perhaps overkill. All you need to do is take the MicroQiskit.lua file, and place somewhere that it can be found when importing.
If using the PICO-8, you will also need the contents of math.p8. This provides a minimal math table required by MicroQiskit.
An example of MicroQiskit Lua in use can be seen in main.lua.