Modernize

[DaniPopes]

Most of the changes in the full diff are formatting and whitespace, so this is best reviewed commit-by-commit or with "hide whitespace".

• Updated edition to "2021", removing the need to manually declare extern crates.
• Cuts down dependencies from 124 to 89.
• Updates all dependencies to latest versions and accomodate any breaking changes (if any).
• Adds Cargo.lock for reproducible builds.
• Improves CPU performance by removing heap allocations and using a more performant address checksum algorithm (from alloy_primitives::Address).
• Replaced the standard hashmap hasher (SipHash) with FxHash for faster reward lookups.
• Fixed Clippy lints.
• Closes https://github.com/0age/create2crunch/pull/15/ by rebasing that commit on top of this branch

Tested with Ryzen 9 5900X and RTX 3060 on x86_64-linux-gnu.