upgrade rust to 1.74.1

[juanbono]

Upgrade to Rust 1.74.1

Description

This PR increases the minimum Rust compiler version to 1.74.1.
It also adds the --locked flag to the cargo-nextest dependency

Checklist

• Linked to Github Issue
• Unit tests added
• Integration tests added.
• This change requires new documentation.
  • Documentation has been added/updated.

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (a5597de) 88.96% compared to head (0624b68) 88.98%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1239      +/-   ##
==========================================
+ Coverage   88.96%   88.98%   +0.01%     
==========================================
  Files          52       52              
  Lines       15588    15564      -24     
==========================================
- Hits        13868    13849      -19     
+ Misses       1720     1715       -5     

Files	Coverage Δ
src/transaction/fee.rs	91.22% <0.00%> (+0.28%)	⬆️

... and 24 files with indirect coverage changes

[pefontana]

Are we upgradring the rust version to 1.74?

[pefontana]

Can you update the version in the README.md and in the github/workflows/rust-tests.yml on the coverage line

starknet_in_rust/.github/workflows/rust-tests.yml

Line 173 in 1854f82

uses: dtolnay/[email protected]