LibDependVersions

Version constraints for a library dependency.

The format is:

<versions>  :=  <wildcard> | <range>
<wildcard>  :=  <seg> "." <seg> "." <seg>
<range>     :=  <wildcard> "-" <wildcard>
<seg>       :=  <digits> | "x"

Examples:

1.5.20           // match only 1.5.20
1.5.x            // match any patch version within 1.5
3.x.x            // match any version with 3 as major version
1.5.20 - 1.x.x   // greater than 1.5.20 and has 1 in major ver