Cop idea: Prefer #be_within over #round

[ydakuka]

Describe the solution you'd like

# bad
expect(result.value.round(3)).to eq max_value

# good
expect(result.value).to be_within(0.001).of(max_value)

Rubocop

ydakuka@yauhenid:~/Work/project$ bin/rails_docker rubocop -V
1.55.1 (using Parser 3.2.2.3, rubocop-ast 1.29.0, running on ruby 2.7.8) [x86_64-linux]
  - rubocop-capybara 2.18.0
  - rubocop-factory_bot 2.23.1
  - rubocop-performance 1.18.0
  - rubocop-rails 2.20.2
  - rubocop-rake 0.6.0
  - rubocop-rspec 2.23.0
  - rubocop-thread_safety 0.5.1