airbnb lint should not warn on vuex state mutation

[LinusBorg]

We had something similiar in the old webpack template:

https://github.com/vuejs-templates/webpack/pull/1003/files#diff-8e97c989db32864ed48507016adcb32d

close #3954

[haoqunjiang]

Just realized this config can be added to @vue/eslint-config-airbnb rather than the eslint plugin… And tests are not mandatory for config packages.

[LinusBorg]

Understood, will make the changes

[LinusBorg]

@sodatea I moved the change to the config-aribnb package as discussed.

Though technically this could be considered a breaking change if we are very picky.

[haoqunjiang]

Why?
In regard to ESLint configs, it is only a breaking change when it breaks people's builds. But loosening a rule won't cause more build failures.

[LinusBorg]

In that regard I agree.

If someone is pedantic about what kind of code is committed, they now have a rule pass that might have failed before.

But I agree that's so minimal, especially in the context of the change, we can discard it.