Update editor-command to 1.0.0

[LucasPickering]

Description

Describe the change. If there is an associated issue, please include the issue link (e.g. "Closes #xxx"). For UI changes, please also include screenshots.

This replaces shellish_parse with shell-words, which was already in our dep tree so this eliminates one dep at least.

Known Risks

What issues could potentially go wrong with this change? Is it a breaking change? What have you done to mitigate any potential risks?

It's possible there are some differences between the two that break stuff for users. The tests on editor-command are pretty good though so I'm not too worried.

QA

How did you test this?

Relying on editor-command tests

Checklist

• Have you read CONTRIBUTING.md already?
• Did you update CHANGELOG.md?
  • Only user-facing changes belong in the changelog. Internal changes such as refactors should only be included if they'll impact users, e.g. via performance improvement.
• Did you remove all TODOs?
  • If there are unresolved issues, please open a follow-on issue and link to it in a comment so future work can be tracked