Only tagged version (v0.0.1) does not include Config.go

[securityguy]

There is only one tagged version, and both go get -u github.com/hennedo/escpos@latest and go get -u github.com/hennedo/escpos@latest pull it (version v.0.0.1). As a result anyone attempting to use the library receives an older version that does not include Config.go.

An updated tag with the full source code needs to be added. `