Add pip install --upgrade --all command

[dukecat0]

What's the problem this feature will solve?

Upgrade all outdated packages.

Describe the solution you'd like

(Optional) Listing outdated packages by:

$ pip list --outdated --format=freeze

Will upgrade the following packages:
[...]

Then upgrade the listed packages with command:

pip install --upgrade --all

Additional context

Refer to this: https://stackoverflow.com/questions/2720014/how-to-upgrade-all-python-packages-with-pip

[uranusjr]

See discussion in #4551