fix: cannot get env. variables because .git suffix in URL

fix: cannot parse git@myrepo.com/some/repository.git

fix: problem with parsing ssh://git@gitlab.com/...

chore: update of goreleaser

chore: cleanup goreleaser a bit

feat: -version parameter

feat: new '--ignore' feature

Time to time it's good to tell glenv to ignore some env. varibale. This
is in case, when you don't want to override your global env. variable by
variable from GitLab. It might be some token etc.

Example of .envrc
```
eval "$(glenv export -i SOME_VARIABLE)"
```

release v0.8

release v0.7

- fixed problem with stripped env.variables
- breaking change: in dirven's .envrc, instead of `glenv` it's needed
  execute `glenv export subcommand

fix: yet another fix of homebrew release