Using corev2 breaks template with updated version

[elfranne]

Updating go modules breaks current template:

# rename module name in go.mod
go get -u
go mod tidy
go test -v                                                
# github.com/test/test [github.com/test/test.test]
./main.go:40:63: cannot use checkArgs (value of type func(event *"github.com/sensu/sensu-go/api/core/v2".Event) error) as func(event *"github.com/sensu/core/v2".Event) error value in argument to sensu.NewGoHandler
./main.go:40:74: cannot use executeHandler (value of type func(event *"github.com/sensu/sensu-go/api/core/v2".Event) error) as func(event *"github.com/sensu/core/v2".Event) error value in argument to sensu.NewGoHandler
FAIL    github.com/test/test [build failed]

update version are:

github.com/sensu/sensu-go/api/core/v2 v2.16.0
github.com/sensu/sensu-plugin-sdk v0.18.0