Bump Microsoft.NETFramework.ReferenceAssemblies and TaskScheduler (#1651)

Bumps [Microsoft.NETFramework.ReferenceAssemblies](https://github.com/Microsoft/dotnet) and [TaskScheduler](https://github.com/dahall/taskscheduler). These dependencies needed to be updated together.

Updates `Microsoft.NETFramework.ReferenceAssemblies` from 1.0.3 to 1.0.3
- [Commits](https://github.com/Microsoft/dotnet/commits)

Updates `TaskScheduler` from 2.11.0 to 2.12.0
- [Release notes](https://github.com/dahall/taskscheduler/releases)
- [Commits](https://github.com/dahall/taskscheduler/compare/v2.11.0...v2.12.0)

---
updated-dependencies:
- dependency-name: Microsoft.NETFramework.ReferenceAssemblies
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: TaskScheduler
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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