Description

Style/ConstantVisibility doesn't recognize visibility declarations when multiple constants are specified together, causing false positives.

Current Behavior

These valid Ruby patterns incorrectly trigger offenses:

class Foo
  BAR = 42
  BAZ = 43
  private_constant :BAR, :BAZ  # Not recognized
end

class Foo
  BAR = 42
  BAZ = 43
  public_constant [:BAR, :BAZ]  # Not recognized
end

Both produce false positives:

Explicitly make `BAR` public or private using either `#public_constant` or `#private_constant`.
Explicitly make `BAZ` public or private using either `#public_constant` or `#private_constant`.

Expected Behavior

The cop should recognize these valid forms for both public_constant and private_constant:

• Single: private_constant :FOO ✅ (currently works)
• Multiple arguments: private_constant :FOO, :BAR ❌ (doesn't work)
• Array: private_constant [:FOO, :BAR] ❌ (doesn't work)

Proposed Solution

I'd like to submit a PR that:

• Enhances visibility_declaration_for? to handle multiple constant declarations
• Adds test cases for all scenarios
• Ensures all existing tests pass

Would this enhancement be welcome?