Bump immer, @storybook/addon-storyshots and @storybook/react

Removes [immer](https://github.com/immerjs/immer). It's no longer used after updating ancestor dependencies [immer](https://github.com/immerjs/immer), [@storybook/addon-storyshots](https://github.com/storybookjs/storybook/tree/HEAD/code/addons/storyshots-core) and [@storybook/react](https://github.com/storybookjs/storybook/tree/HEAD/code/renderers/react). These dependencies need to be updated together.


Removes `immer`

Updates `@storybook/addon-storyshots` from 6.2.9 to 6.5.16
- [Release notes](https://github.com/storybookjs/storybook/releases)
- [Commits](https://github.com/storybookjs/storybook/commits/v6.5.16/code/addons/storyshots-core)

Updates `@storybook/react` from 6.1.21 to 6.5.16
- [Release notes](https://github.com/storybookjs/storybook/releases)
- [Changelog](https://github.com/storybookjs/storybook/blob/next/CHANGELOG.v6.md)
- [Commits](https://github.com/storybookjs/storybook/commits/v6.5.16/code/renderers/react)

---
updated-dependencies:
- dependency-name: immer
  dependency-type: indirect
- dependency-name: "@storybook/addon-storyshots"
  dependency-type: direct:development
- dependency-name: "@storybook/react"
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>