build: retract v0.0.2

A stray version of lnd was pushed out waaaay back in 2016 that can trip
up `pkg.go.dev` and things like `go get`. Using the new Go 1.16 feature,
we can now "retract" this version, which marks it as being unavailable.

go.mod

@@ -90,3 +90,5 @@ replace github.com/dgrijalva/jwt-go => github.com/golang-jwt/jwt v3.2.1+incompat
 // If you change this please also update .github/pull_request_template.md and
 // docs/INSTALL.md.
 go 1.16
+
+retract v0.0.2