Update immutable contract variables to SNAKE_CASE

[samajammin]

Motivation

Small linting update

Details

lint:sol warns that immutable variables should use SNAKE_CASE:

Relates to updates in #1008

[ctrlc03]

@samajammin perhaps we can close once we merge this #1083? -

maci/.solhint.json

Line 10 in 5be0b71

"immutable-vars-naming": ["warn", { "immutablesAsConstants": false }]

disables this rule which (at least imo) makes the code nicer than a bunch of capital snake case vars.

[ctrlc03]

@samajammin what you think of the above suggestion?

[ctrlc03]

I'll close this for now, but feel free to re-open if you believe that muting the warning is a not a good enough resolution for this