style: include `manual_midpoint`

[vil02]

Pull Request Template

Description

This PR removes the manual_midpoint from the list of suppressed lints. Continuation of #883.

Checklist:

• [x] I ran bellow commands using the latest version of rust nightly.
• [x] I ran cargo clippy --all -- -D warnings just before my last commit and fixed any issue that was found.
• [x] I ran cargo fmt just before my last commit.
• [x] I ran cargo test just before my last commit and all tests passed.
• [x] I added my algorithm to the corresponding mod.rs file within its own folder, and in any parent folder(s).
• [x] I added my algorithm to DIRECTORY.md with the correct link.
• [x] I checked COUNTRIBUTING.md and my code follows its guidelines.

Please make sure that if there is a test that takes too long to run ( > 300ms), you #[ignore] that or try to optimize your code or make the test easier to run. We have this rule because we have hundreds of tests to run; If each one of them took 300ms, we would have to wait for a long time.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.51%. Comparing base (bc3ef17) to head (3a1a936).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #884   +/-   ##
=======================================
  Coverage   95.51%   95.51%           
=======================================
  Files         317      317           
  Lines       22954    22954           
=======================================
  Hits        21924    21924           
  Misses       1030     1030           

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