Version 2.1.0

Full Changelog

Implemented enhancements:

• Add option to validate 'overseas' as location #40 (irisfaraway)
• Add option to validate 'overseas' as business type #38 (irisfaraway)

Merged pull requests:

• Update VCR cassettes #39 (irisfaraway)
• Add guidance on custom error messages to README #37 (irisfaraway)