Replace transformation functions with Optics

[kierans]

Currently the generator uses a set of transformation functions to transform the API spec into an AST for code generation eg: inlining references.

Using Optics (lenses) is a better way of achieving the same outcome but in a simpler, more composable fashion.

See more

• https://itnext.io/a-beginners-guide-to-ramda-part-2-lenses-62bdd3993598
• https://www.youtube.com/watch?v=tvHghZBMVJU
• https://github.com/calmm-js/partial.lenses