contracts: allow upper case acronyms lint

[palango]

Motivation

I have a contract named DKG for which the auto-generated code created the following clippy warning:

warning: name `DKG` contains a capitalized acronym
  --> crates/dkg-cli/src/dkg_contract.rs:25:16
   |
25 |     pub struct DKG<M>(ethers::contract::Contract<M>);
   |                ^^^ help: consider making the acronym lowercase, except the initial letter: `Dkg`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
   = note: `#[warn(clippy::upper_case_acronyms)]` on by default

According to the solidity style guide the name is fine: https://docs.soliditylang.org/en/v0.5.3/style-guide.html#naming-styles

Solution

Allow that clippy lint by default

PR Checklist

• Added Tests
• Added Documentation
• Updated the changelog
• Breaking changes

[mattsse]

lgtm

ty!