bolt upgrade flags

Flags to copy from Yarn:

```
--pattern "@scope/(foo|bar)"
--scope, -S @scope
--latest, -L
--caret
--tilde
--exact
```

Note that `--pattern` and `--scope` should both be specifiable multiple times (assuming Yarn allows that)

https://yarnpkg.com/en/docs/cli/upgrade

Start with Bolt's upgrade command and compare its current flags with the linked Yarn upgrade documentation. Add support for the listed flags, allowing --pattern and --scope to be specified multiple times, and verify that the upgrade command accepts the documented forms.

Written by the indexing model from the issue text.