upgrade and upgrade-all don't work with pre-release package versions

[mmerickel]

pipx version 0.14.0.0

Describe the bug
Upgrading packages that were installed with pipx install --pip-args '\--pre' <pkg> fails to upgrade to a newer pre-release without also specifying pipx upgrade --pip-args '\--pre' <pkg>.

It'd be nice if pipx recognized the current version of the package was a pre-release version and automatically upgraded it with --pre so that pipx upgrade-all would work. Right now I need to manually upgrade the package and pass --pip-args.

The package I've been upgrading is poetry.

[uranusjr]

Auto-inferring pre-releases has a lot of pit-falls (which is why pip chose this current behaviour), and the suggestion would probably dissatisfy another group of people.

[itsayellow]

With the merge of #222 pipx currently remembers the options used for install when later executing other pipx commands like upgrade-all and reinstall-all. This hasn't been released yet to pypi but if you grab the latest pipx from github (and consider it beta) it should do what you want.

[itsayellow]

With the release of pipx versions >= 0.15.0.0, pipx upgrade-all now uses the same --pip_args that were used during install.

pipx upgrade will only use the --pip_args supplied to it, however.