Replace github.com/gofrs/uuid with github.com/google/uuid

[Brahmasmi]

In https://github.com/gnormal/postgres-go/blob/master/gnorm_templates/table.gotmpl and https://github.com/gnormal/postgres-go/blob/master/gnorm_templates/fields.gotmpl could we replace

	uuid "github.com/gofrs/uuid"

with

	uuid "github.com/google/uuid"

Dhanyavaad.