Enhancement/add checker consider using min max builtin

[Qwiddle13]

Steps

• Add yourself to CONTRIBUTORS if you are a new contributor.
• Add a ChangeLog entry describing what your PR does.
• If it's a new feature or an important bug fix, add a What's New entry in
  doc/whatsnew/<current release.rst>.
• Write a good description on what the PR does.

Description

Adds a warning to replace code like

if value < 10:
    value = 10

with its respective

value = max(value, 10)

Type of Changes

	Type
✓	✨ New feature

Related Issue

Closes #3406

[Qwiddle13]

Almost all of the changes here are from previous commits to #3406 by user manderj. I mostly just polished it up and got the test cases working with test_functional.py and they seem to pass now.

Is this a big enough change that Step 3 (doc/whatsnew/<current release.rst>) needs to be be done too?

[coveralls]

Coverage increased (+0.01%) to 91.62% when pulling 058d609 on Qwiddle13:enhancement/add-checker-consider-using-min-max-builtin into c7ac7c0 on PyCQA:master.

[Pierre-Sassoulas]

Nice change and good functional tests, I left some remarks (that will requires to regenerate the output of functional test) but I'd merge this.

[Qwiddle13]

I think I'm good with this as it stands. @Pierre-Sassoulas do you have or know who has write access and can merge?

[Pierre-Sassoulas]

Thank you for this new checker, it will be included in the next version that we'll release soonish :)