Invoice payload posting_date param

Adds optional posting_date parameter to the Invoice payload, mapping to @postingDate on the InvoiceRequest SOAP element

Align code with tag / release

Fix issue with v0.11.2 misalignment between code and tag / release version.

Account for country in fallback state tax rate determination

Take country code into account when determining applicable state tax rate in fallback quotation context.

Remove international fallback rates

• Remove international quotation fallback rates to match Vertex level discontinuation of international sales tax collection
• Adjust domestic quotation fallback rates to better match current Vertex rates
• Fix GitHub Actions CI test failures (lock Rack version, require OpenStruct, use underscore instead of snakecase, use Checkout V4 instead of V3)

Add compatibility with circuitbox v2.0.0

What's Changed

• Compatibility with circuitbox 2.0.0 by @a-maas in #71

Full Changelog: v0.10.2...v0.11.0

APO fallback rates, graceful unrecognized US states

Adds APO fallback rates, and prevents raising an error when providing unrecognized US states.

See #67 for more details.

Don't require postal_code for non-US locations

Changes

• loosen quotation validation rules to only require postal_code for US based locations

Support specific shipping terms and physical origins for line items

Changes

• quotation payload supports :delivery_term param to pick shipping terms that should be applied to the particular quotation request
• seller override within a line_item object can now include a physical_origin which allows Vertex to calculate sales tax for the particular line_item correctly (if the Vertex account has been set up to support this - VAT collection registrations for the supported countries...)

Quotation Fallback Fix

Changes

• Coerce the total_tax to a decimal before attempting to round it
• Add regression tests for empty quotes around subtotal and total_tax in the fallback response object

EU VAT calculation

Adds support for calculating VAT for EU countries with predefined quotation fallbacks. Changes validation criteria for addresses when raising Vertex::ValidationError.