Switch rules to object export style (fixes eslint v8+)

[idolize]

Fixes #298. Verified all tests pass.

From eslint docs:

In ESLint v7.0.0, rules that were written as a function (rather than object) were able to provide fixes. In ESLint v8.0.0, only rules written as an object are allowed to provide fixes and must have a meta.fixable property set to either "code" or "whitespace".

[idolize]

FYI @Intellicode

[Intellicode]

Hi @idolize, thanks for your PR! Could you maybe rebase such that the build can be picked up? It was broken due to the deprecation of the configured build image.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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0.0% Duplication

[idolize]

@Intellicode I just did a rebase squash - hopefully that triggers the new build appropriately!

[manovotny]

@Intellicode any idea when you'll cut a new release for this so we can get rid of the npm / yarn warning on not having || ^8?

npm WARN eslint-plugin-react-native@3.11.0 requires a peer of eslint@^3.17.0 || ^4 || ^5 || ^6 || ^7 but none is installed. You must install peer dependencies yourself.