Add [+-]portion.inf to upcast_types

[gsakkis]

• Closes Quantity intervals #1888
• Executed pre-commit run --all-files with no errors
• Added an entry to the CHANGES file

[AlexandreDecan]

Notice that the two paths (portion.const._PInf and portion.const._NInf) are part of the private API of portion. I don't know to which extent this private API will be subject to changes in the future. At the same time, I don't see any other good alternative :-)

[codspeed-hq]

CodSpeed Performance Report

Merging #1889 will not alter performance

_{Comparing gsakkis:master (e81d413) with master (57764be)}

Summary

✅ 439 untouched benchmarks

[gsakkis]

@andrewgsavage could you take a look?

[andrewgsavage]

looks fine, just needs a maintainer to merge it.

Notice that the two paths (portion.const._PInf and portion.const._NInf) are part of the private API of portion. I don't know to which extent this private API will be subject to changes in the future. At the same time, I don't see any other good alternative :-)

just needs a new PR with changes if you do end up changing it.

[andrewgsavage]

Why was this closed? Do you not want it merged?