v1.0.6 tag with accumulated patches

[wkhere]

Hi!

I guess it's time for v1.0.6.

I have very specific patch in mind: in most of my pflag usage patterns it's pretty unusable without #220, namely without flag-compatible Output. I remember putting a very specific commit into go.mod for years already. It would be much nicer to just use v1.0.6.

Plus, of course, seeing other accumulated patches.

[josegonzalez]

@fredbi thoughts on putting out a patch release? Seems pretty reasonable to me to do so before we do any 1.1.0 or anything.