Cases for Jest tests

[fuhrmanator]

Here are some common TypeScript cases for Jest tests:

• [ ] Variable declaration space (class as variable)
• [ ] Various cases for export/import
• [ ] "Place" (if TypeScript can figure out things like dir/index.ts from dir)
• [ ] import/require for importing type only (?)
• [ ] Lazy loading case
• [x] Type alias
• [ ] Barrel

[fuhrmanator]

The first item (class as a variable) is related to #43