bump(github.com/spf13/cobra):e1e66f7b4e667751cf530ddb6e72b79d6eeb0235

This is a followup PR to #96, since https://github.com/spf13/cobra/pull/36 got merged, to address problem described in [BZ#1171627](https://bugzilla.redhat.com/show_bug.cgi?id=1171627).