- `@uppy/aws/s3-multipart`: remove `client` getter and setter.
- reason: internal usage only
- migrate: use exposed options only
- `@uppy/core`: remove `AggregateError` polyfill
- reason: [should be polyfilled by the user](https://github.com/transloadit/uppy/pull/3532#discussion_r818602636)
- migrate: install `AggregateError` polyfill or use `core-js`
- `@uppy/core`: remove `reset()` method
- reason: it's a duplicate of `cancelAll`, but with a less intention revealing name
- migrate: use `cancelAll`
- `@uppy/core`: remove backwards compatible exports (static properties on `Uppy`)
- reason: transition to ESM
- migrate: import the `Uppy` class by default and/or use named exports for everything else.
- `@uppy/react`: don't expose `validProps`
- reason: internal only
- migrate: do not depend on this
- `@uppy/store-redux`: remove backwards compatible exports (static properties on `ReduxStore`)
- reason: transition to ESM
- migrate: use named imports
- `@uppy/thumbnail-generator`: remove `rotateImage`, `protect`, and `canvasToBlob` from prototype.
- reason: internal only
- migrate: don't depend on this
* enforce some eslint rules
* enforce accessibility linter rules
* harden lint rules with only 1 or 2 warnings
* fix remaining rules with less than 3 warnings
* fix e2e tests
* fix remaining rules with less than 4 warnings
* fix remaining rules with less than 6 warnings
* fix `shuffleTaglines`
* fix companion build
