chore(release): 6.0.0-next.1 [skip ci]

# [6.0.0-next.1](v5.0.8...v6.0.0-next.1) (2023-07-15)

### Bug Fixes

* further updates for v6 ([71ecdb5](71ecdb5))
* migrate code for [@typescript-eslint](https://github.com/typescript-eslint) v6 ([5c6b1a2](5c6b1a2))

### Build System

* increase minimum supported TypeScript version to 4.3.5 ([aefe6b2](aefe6b2))

### Features

* **prefer-immutable-types:** use suggestions instead of a fixer by default ([#598](#598)) ([3fb9028](3fb9028))
* remove `assumeTypes` option ([6be5862](6be5862))

### BREAKING CHANGES

* increase minimum supported TypeScript version to 4.3.5
* remove `assumeTypes` option
* **prefer-immutable-types:** The fixer config no longer inherits as many options as before; be sure to be
explicit in your configs.