fix(isPassportNumber): update Mexico passport formats

[leno23]

Summary

• Updates the Mexico (MX) passport regex to accept both legacy and current formats
• Legacy: one letter followed by 7–8 digits (e.g. J0000001, J00000001)
• Current: one letter followed by 8 alphanumeric characters (e.g. G20693408, A1B2C3D4E)

Example

isPassportNumber('J00000001', 'MX'); // true (legacy)
isPassportNumber('G20693408', 'MX'); // true (current)
isPassportNumber('123456789', 'MX'); // false (all digits)

Closes #2641

Test plan

• npm test passes
• Added MX valid/invalid cases in test/validators.test.js

Made with Cursor

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (7fdc788) to head (a93bcc7).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2719   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          114       114           
  Lines         2587      2587           
  Branches       656       656           
=========================================
  Hits          2587      2587           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.