Proposal: Please tag a new release and using Semantic Versioning

[KateGo520]

I found that the latest version is v0.0.1 committed on 24 Feb 2017. When module users try to get github.com/gosuri/uiprogress, the version v0.0.1 will be return.

$go get -v github.com/gosuri/uiprogress
go: downloading github.com/gosuri/uiprogress v0.0.1
go: github.com/gosuri/uiprogress upgrade => v0.0.1

It would be great to have a new tagged release be named in the format vX.X.X format so that go mod can read it.

So, I propose this project to tag a new release and follow Semantic Versioning in future versions. For example, v1.0.1, v2.0.0, v3.1.0-alpha, v3.1.0-beta.2etc.

[KateGo520]

@gosuri @Collinux Could you help me review this issue? Thx :p