-ware suffixed nouns not pluralized correctly

[edwardhpe]

Version 5.5.2

>>> e = inflect.engine()
>>> e.plural('firmware')
'firmwares'
>>> e.plural('software')
'softwares'
>>> e.plural('hardware')
'hardwares'

And so on.

[jaraco]

Seems reasonable. Would you be willing to develop a fix (with tests)?