Add changelog for what we did to Spree::TaxRate
Add changelog for what we did to Spree::TaxRate

We deprecated `Spree::TaxRate.adjust` and removed
`Spree::TaxRate.match`. People should not stumble over this.

pervino/solidus,pervino/solidus,jordan-brough/solidus,Arpsara/solidus,pervino/solidus,jordan-brough/solidus,jordan-brough/solidus,Arpsara/solidus,pervino/solidus,Arpsara/solidus,jordan-brough/solidus,Arpsara/solidus