Add v2 to go.mod (#3)

* Just noticed the latest version V2 is not getting picked up by https://pkg.go.dev/ so hopefully this will fix it

* Let's see if regerating the mock file fixes the dependency on v1 of this package

* Fix import

README.md

@@ -2,8 +2,8 @@ Package vat
 ===
 
 ![Build](https://github.com/Teamwork/vat/actions/workflows/build.yml/badge.svg)
-[![Go Report Card](https://goreportcard.com/badge/github.com/Teamwork/vat)](https://goreportcard.com/report/github.com/Teamwork/vat)
-[![GoDoc](https://godoc.org/github.com/Teamwork/vat?status.svg)](https://godoc.org/github.com/Teamwork/vat)
+[![Go Report Card](https://goreportcard.com/badge/github.com/teamwork/vat)](https://goreportcard.com/report/github.com/teamwork/vat)
+[![GoDoc](https://godoc.org/github.com/teamwork/vat?status.svg)](https://godoc.org/github.com/teamwork/vat)
 [![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/teamwork/vat/master/LICENSE)
 
 Package for validating VAT numbers & retrieving VAT rates (from [ibericode/vat-rates](https://github.com/ibericode/vat-rates)) in Go.

go.mod

@@ -1,4 +1,4 @@
-module github.com/teamwork/vat
+module github.com/teamwork/vat/v2
 
 go 1.21
 

numbers_test.go

@@ -9,7 +9,7 @@ import (
 	"testing"
 
 	"github.com/golang/mock/gomock"
-	"github.com/teamwork/vat/mocks"
+	"github.com/teamwork/vat/v2/mocks"
 )
 
 var tests = []struct {