Doesn't handle double digits

[emilgoldsmith]

Hi!

Thank you for this plugin it's a nifty little helper. Just wanted to point out that it doesn't handle several digits though. I've just been using it for building a new product right now and until deploying the first MVP we're just using v0.0.x and up to x=13 now, but since we reached x=10 it just gives fatal error v0.0.10 every time you call git semver patch, so we have to do it manually.

I'm assuming it's not too hard if you know bash well, I was trying to look at the code to see if I could do it myself but not a bash guru so it wasn't obvious to me anyway.

[emilgoldsmith]

Actually just took a quick look, seems it's the sorting that's the problem as the parsing seems okay. Maybe I'll put in a bit more time later and submit a fix, but got to go now

[john-tipper]

I have pushed a PR (#46) that I believe fixes this (hope it will be merged soon), please let me know if you see further issues.