V5 only supports python3. Since at the moment the only packages
that use ftfy are spacy and textacy which both support
python2 and 3, I propose to roll back to v4 until another package
requires v5, at that point we can make a duplicate package.
ftfy package was added for spaCy and is only used by spaCy.
This change downgrades its version to meet the bounds specified by
spaCy (>=4.4.2,<5.0.0).
Relevant to #28643.
