Add support for optional Bool, Double, Float and Int

[ghv]

New Feature Submissions:

1. Does your submission pass tests?
2. Have you run SwiftLint on your code locally prior to submission?

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully run the tests with your changes locally?

You can now create V records for Bool?, Double?, Float?, and Int? types.