Implement Features Per Issue 579

[jasonhorner]

Issue #, if available:
#579

Description of changes:

• Added support for validating US phone numbers and US postal codes in the PatternMatch analyzer by incorporating the following regex patterns:
  1. US Phone Number Regex:

     val PHONE_NUMBER_US: Regex = """^(?:\+1\s?)?(?:\(?[2-9][0-9]{2}\)?[\s-]?)?[2-9][0-9]{2}[\s-]?[0-9]{4}(?:\s?(?:ext|x|extension)\s?[0-9]{4})?$""".r

  2. US Postal Code Regex:

     val POSTAL_CODE_US: Regex = """\b\d{5}(?:-\d{4})?\b""".r

• Updated the PatternMatch examples and unit tests to include these new patterns for validation.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jasonhorner]

I'm looking for feedback on this PR. I think it is ready to go. I can promote it to a full PR once I get some indication that I'm headed in the right direction. I'd like to also fix #533 but can do that as a separate PR if that is desirable.