Allow non-strict equality check to work on xml validate

[daraghhiggins12]

When using XMLValidator.validate you must use strict equality check to confirm if the XML is valid or not.
Example: XMLValidator.validate(<some_xml>) === true

If some xml is invalid and without the use of a strict equality check the result is always true
Example: XMLValidator.validate(<some_invalid_xml>) returns an error object meaning a non-strict check will always equate to true

A cleaner more readable usage would be to return an object with an isValid member that is either true or false.

[github-actions]

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[daraghhiggins12]

I can work on this @amitguptagwl if you'd like

[amitguptagwl]

Thanks @daraghhiggins12 to highlight the issue. The major problem I see in the fix that it'll required to be released as a major version.Until or unless there are some major changes in the library, I would prefer to hold this change.