the releases should have `v` prefix

[SVilgelm]

Hi,
Could you please re-tag (at least latest) releases by adding v prefix to each release?
Seems go get does not recognize the tags without v as versions.

golangci-lint uses github.com/jgautheron/goconst v0.0.0-20201117150253-ccae5bf973f3 in go.mod file, and I tried to update it to use the latest version and expected to see github.com/jgautheron/goconst v1.4.0, but no changes.
Then I found this issue: golang/go#30146
Seems the v is a convention

[jgautheron]

I just tagged the last version v1.4.0.