fix: explicit jest plugin dependency

[chambo-e]

Hello 👋

I am getting a lot of errors after upgrading to 0.3.2

Definition for rule 'jest/no-standalone-expect' was not found  jest/no-standalone-expect

Because I don't have eslint-plugin-jest as an explicit plugin in my config :)

[mxschmitt]

This looks fine, @mskelton wdyt?

[mskelton]

I tried doing something when adding the first rule, but for some reason it wasn't working. I must have had something configured wrong as I just tested this out locally with adding jest-playwright to the recommended config and it works like a charm.

[mskelton]

Looks good aside from the readme JSON trailing comma. Thanks for contributing!

[mxschmitt]

@mskelton thanks for taking care!