Add support for multiple predicates We're supposed to be able to handle multiple predicates, but so far our code only works with one. src/range.rs ------------ Let's split the parse function up. Most of what we already had will be called `parse_predicate`. It works on one predicate at a time. We'll use `parse` to split apart the string on commas and send each portion to `parse_predicate`. A quick bit of error checking verifies that we have at least one predicate, then we can return our `VersionReq`.