https://github.com/seaweedfs/goexif: v2.0.0 must either not have go.mod file or be placed into /v2 directory

[kvtb]

The version tagged v2.0.0 must either not have go.mod file or be placed into /v2 directory

Currently, seaweedfs can be built only because cache on proxy.golang.org is incoherent and it cached previous version

With Google's proxy is off (GONOPROXY='*') the build fails:

# GONOPROXY='*' go mod download -x github.com/seaweedfs/goexif@v2.0.0+incompatible

go: github.com/seaweedfs/goexif@v2.0.0+incompatible: invalid version: module contains a go.mod file, so module path must match major version ("github.com/seaweedfs/goexif/v2")

The issue makes troubles with packaging seaweedfs into Linux distros which perform reproducible package builds in sandboxes without access to cache sites like proxy.golang.org

[kvtb]

The commit seaweedfs/goexif@90f82ad should not add "go.mod"