[Issue 18374] Add range functions to Nullable

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18374

elpenguino+D at gmail.com changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
                 CC|                            |elpenguino+D at gmail.com
         Resolution|---                         |FIXED

--- Comment #3 from elpenguino+D at gmail.com ---
Fixed by https://github.com/dlang/phobos/pull/8417

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