Bumps [Fable.Core](https://github.com/fable-compiler/Fable) from 3.1.6 to 3.2.0.
- [Release notes](https://github.com/fable-compiler/Fable/releases)
- [Commits](https://github.com/fable-compiler/Fable/commits)

Signed-off-by: dependabot[bot] <support@github.com>