Improve required version matching

Currently XBPS only supports matching for minimal required versions. That means that always a package that is greater or equal than required version is enough to satisfy the dependency.

I'd like to extend version matching to be able to specify shell patterns as well as additional
tests for equal, greater, less, greater or equal and less or equal requirements.

The following is a list of the examples I plan to support with this blueprint:

foo-2.[1-3] -> Accepts any 'foo' package equal than 2.[123]
foo<=2.0 -> Accepts any 'foo' package less than 2.0
foo>=2.1 -> Accepts any 'foo' package greater or equal than 2.1
foo<1.99 -> Accepts any 'foo' package less than 1.99
foo>3.0 -> Accepts any 'foo' package greater than 3.0
foo>=2.0<3.0 -> Accepts any 'foo' package greater or equal than 2.0 and less than 3.0
foo-{3.0,3.1} -> Accepts any 'foo' package equal than 3.0 or 3.1
foo>=4.99.[0-9]<5.[0-2] -> Accepts any 'foo' package greater or equal than 4.99.[0-9]* and less than 5.[0-2]