Bump immutable master
Bumps and [immutable](https://github.com/immutable-js/immutable-js). These dependencies needed to be updated together. Updates `immutable` from 4.3.7 to 4.3.8 - [Release notes](https://github.com/immutable-js/immutable-js/releases) - [Changelog](https://github.com/immutable-js/immutable-js/blob/main/CHANGELOG.md) - [Commits](https://github.com/immutable-js/immutable-js/compare/v4.3.7...v4.3.8) Updates `immutable` from 5.1.4 to 5.1.5 - [Release notes](https://github.com/immutable-js/immutable-js/releases) - [Changelog](https://github.com/immutable-js/immutable-js/blob/main/CHANGELOG.md) - [Commits](https://github.com/immutable-js/immutable-js/compare/v4.3.7...v4.3.8) --- updated-dependencies: - dependency-name: immutable dependency-version: 4.3.8 dependency-type: indirect - dependency-name: immutable dependency-version: 5.1.5 dependency-type: indirect ... Signed-off-by: dependabot[bot] <support@github.com>