Generify the Comparable type in the Range class

[asdm90]

The generic type declaration for the Range class can be improved with wildcards like so:

Current declaraction:
public final class Range<T extends Comparable> implements Serializable

Possible enhancement:
public final class Range<T extends Comparable<? super T>> implements Serializable

This should remove a couple of IDE warnings about the use of generics in the class and should be backwards compatible.

[vladmihalcea]

Since you already investigate it, you could send a Pull Request with a change proposal. I'll investigate it afterward.

[vladmihalcea]

Fixed.