feat(bash/bashrc): add `pip3-all-upgrade` Bash alias
feat(bash/bashrc): add `pip3-all-upgrade` Bash alias

The pip2 version of this alias has been in the `bashrc` file for a
while. The pip2 version of the alias also works for pip3 only when
Python 3 is installed via `pyenv`. The Homebrew version requires the
`pip3` command explicitly. The new alias works exclusively for Python 3.

shoichiaizawa/dotfiles,shoichiaizawa/dotfiles,shoichiaizawa/dotfiles