Enforce no spaces before closing brackets

[tewsonseeoun-toast]

Fixes standard/standard#1348.

Enforce no spaces before closing brackets and also add test cases.

There's some duplicate code around setting up eslint.CLIEngine in the tests which I hope to improve in a separate PR so this PR is focused only on the linked issue above.

[LinusU]

Neat 👍

[feross]

This will be part of standard v14

[tewsonseeoun-toast]

@feross Does this mean further pull requests should be opened in https://github.com/standard/standard instead?

[feross]

@tewsonseeoun-toast For standard v14, I started a new system for adding rules. I'd like to put all new rules into the eslintrc.json file there until it's time to release the next major version. At the time that I cut the official v14.0.0 release, I will move all these rules out into the respective shared eslint configs (like this repo).

This makes it much easier to do a beta release of standard since I don't need to do beta releases of the eslint config repos too and then bump all the versions together.

I kept this PR open so I can merge it when it's time :) But in the future, I would direct PRs to the main standard/standard repo.

[tewsonseeoun-toast]

@feross That's fair enough. Thank you for the explanation!