fix(graph-utl): lets findRuleByName also search in 'required' rules

[sverweij]

Description

• lets findRuleByName also search in 'required' rules

Motivation and Context

fixes #930

How Has This Been Tested?

• [x] green ci
• [x] additional automated non-regression test

Screenshots

With this rule added to dependency-cruiser's own config

// ...
  "required": [
    {
      "name": "something-required",
      "comment": "Foo bar baz quux garply waldo fred plugh xyzzy thud",
      "severity": "warn",
      "module": {
        "path": "^src/meta.cjs$"
      },
      "to": {
        "path": "^test/kannie"
      }
    }
  ],
// ...

... npx depcruise --progress -T err-long shows this:

  warn something-required: src/meta.cjs
    Foo bar baz quux garply waldo fred plugh xyzzy thud

✘ 1 dependency violations (0 errors, 1 warnings). 545 modules, 1325 dependencies cruised.
⚠ 7 known violations ignored. Run with --no-ignore-known to see them.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Documentation only change
• [ ] Refactor (non-breaking change which fixes an issue without changing functionality)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• [x] :book:

  • My change doesn't require a documentation update, or ...
  • it does and I have updated it

• [x] :balance_scale:

  • The contribution will be subject to The MIT license, and I'm OK with that.
  • The contribution is my own original work.
  • I am ok with the stuff in CONTRIBUTING.md.

[codeclimate[bot]]

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