indirect dependency github.com/mitchellh/osext has been deleted

[harbinha]

I cannot upgrade to the latest due to indirect dependency being deleted https://github.com/mitchellh/osext/. Details here https://gist.github.com/mitchellh/90029601268e59a29e64e55bab1c5bdc?permalink_comment_id=4802235#gistcomment-4802235

go get -u github.com/hashicorp/vault-plugin-secrets-kv
produces error:

go: github.com/hashicorp/vault-plugin-secrets-kv@upgrade (v0.16.2) indirectly requires github.com/mitchellh/osext@v0.0.0-20151018003038-5e2d6d41470f: github.com/mitchellh/osext@v0.0.0-20151018003038-5e2d6d41470f: invalid version: git ls-remote -q origin in /Users/hharbin/go/pkg/mod/cache/vcs/...: exit status 128:
        remote: Repository not found.
        fatal: repository 'https://github.com/mitchellh/osext/' not found