(not semver) add two match model for '~' and '^' - #25

@chinakids thanks for the contribution. However, I can't accept it as is. First of all, ~ and ^ don't seem like part of a "pure" semantic versioning. Secondly, tests are lacking.

I don't mind adding this npm's advanced ranges syntax, but as a separate API. It's clearly stated in the docs that "Advanced range syntax desugars to primitive comparators in deterministic ways.", which means you can add functions like match_advanced, which would reuse current match function underneath after desugaring advanced operators.

I'd be happy to accept PR in this case. Thanks.

Thanks，I think i can understand what u mean

I believe that supporting all of the advanced range syntax would be nice. If this needs to be implemented in a separate function, I think satisfies is a great choice as this is what it is called in the node semver module.

As Konstantine already said, it should be done in a separate API (class, ...). I've linked the respective issue, so closing this.