Update buildinfo to parse output of go list set on compile

[0pcom]

skycoin/skywire#1908 (comment)

current method for setting buildinfo relies on 'git' and can only be done from the cloned repo sources; i.e,:

$ go build -mod=vendor -ldflags="-X 'github.com/skycoin/skywire-utilities/pkg/buildinfo.version=$(git describe)' -X 'github.com/skycoin/skywire-utilities/pkg/buildinfo.date=$(date -u "+%Y-%m-%dT%H:%M:%SZ")' -X 'github.com/skycoin/skywire-utilities/pkg/buildinfo.commit=$(git rev-list -1 HEAD)'" ...

this PR adds the golist variable to pkg/buildinfo which may be set to the output of go list on compile as follows:

go build -ldflags="-X 'github.com/skycoin/skywire-utilities/pkg/buildinfo.golist=$(go list -m -json -mod=mod github.com/skycoin/skywire@develop)' -X 'github.com/skycoin/skywire-utilities/pkg/buildinfo.date=$(date -u "+%Y-%m-%dT%H:%M:%SZ")'" cmd/skywire/skywire.go

The golist variable is parsed on init and will set version and commit hash - if these variables are set as the default value "unknown"

This permits building and installing properly versioned binaries - without needing to fetch the sources explicitly. So it will work with go run or go install as well as go build

Also included on this PR is an update of all the code dependencies via go get -u ./...