Restore parsing of gentoo string with condition (#195)

* cmd/helpers: Permit to parse gentoo package str with condition

* Update vendor pkgs-checker @v0.8.1

vendor/github.com/spf13/cobra/projects_using_cobra.md

@@ -0,0 +1,35 @@
+## Projects using Cobra
+
+- [Arduino CLI](https://github.com/arduino/arduino-cli)
+- [Bleve](http://www.blevesearch.com/)
+- [CockroachDB](http://www.cockroachlabs.com/)
+- [Cosmos SDK](https://github.com/cosmos/cosmos-sdk)
+- [Delve](https://github.com/derekparker/delve)
+- [Docker (distribution)](https://github.com/docker/distribution)
+- [Etcd](https://etcd.io/)
+- [Gardener](https://github.com/gardener/gardenctl)
+- [Giant Swarm's gsctl](https://github.com/giantswarm/gsctl)
+- [Git Bump](https://github.com/erdaltsksn/git-bump)
+- [Github CLI](https://github.com/cli/cli)
+- [GitHub Labeler](https://github.com/erdaltsksn/gh-label)
+- [Golangci-lint](https://golangci-lint.run)
+- [GopherJS](http://www.gopherjs.org/)
+- [Helm](https://helm.sh)
+- [Hugo](https://gohugo.io)
+- [Istio](https://istio.io)
+- [Kool](https://github.com/kool-dev/kool)
+- [Kubernetes](http://kubernetes.io/)
+- [Linkerd](https://linkerd.io/)
+- [Mattermost-server](https://github.com/mattermost/mattermost-server)
+- [Metal Stack CLI](https://github.com/metal-stack/metalctl)
+- [Moby (former Docker)](https://github.com/moby/moby)
+- [Nanobox](https://github.com/nanobox-io/nanobox)/[Nanopack](https://github.com/nanopack)
+- [OpenShift](https://www.openshift.com/)
+- [Pouch](https://github.com/alibaba/pouch)
+- [ProjectAtomic (enterprise)](http://www.projectatomic.io/)
+- [Prototool](https://github.com/uber/prototool)
+- [Random](https://github.com/erdaltsksn/random)
+- [Rclone](https://rclone.org/)
+- [Skaffold](https://skaffold.dev/)
+- [Tendermint](https://github.com/tendermint/tendermint)
+- [Werf](https://werf.io/)