suggesstion: use v1.1.1 format when release version

[thinkerou]

[thaJeztah]

ping @taowen is it possible to add a new v1.0.3 tag to assist projects that switched to go mod (which requires the v prefix)?

edit: changed v1.1.1 -> v1.0.3

[thaJeztah]

ping @taowen PTAL 🤗

[mrhwick]

Also experiencing build errors from gofmt output on a project which depends on this library (via other dependencies, it seems) after switching that project to use go modules.

[thaJeztah]

@taowen ptal

[Hellseher]

Ping to add v and go.mod.