Move the repo versioning to semver

[kerak19]

At this moment this package is based on the Cycloid's Backend releases and matches the version. It causes us problems, because Go versioning is based on semver. It's not possible to fetch selected CLI version as a package, as Go expects every major version to be kept in a separate directory, i.e.:

go get github.com/cycloidio/[email protected]
go: github.com/cycloidio/[email protected]: invalid version: module contains a go.mod file, so module path must match major version ("github.com/cycloidio/cycloid-cli/v5")