Get confirmation when bumping major from 0?

[pingvinen]

I just had a case where 1 project in a longer list was still in the 0.x phase. I was bumping majors and did not notice in time that I had now bumped the project to 1.0. This was clearly a mistake on my part, but it made me think that it might be handy if the tool could output a warning or ask for confirmation when bumping the major from 0 -> 1.