Issue originally made by @guybedford

Description

It would be nice to add a custom options whitelist and blacklist to the runtime transformer something like:

plugins: [['transform-runtime', { exclude: ['Promise', 'Array.*', 'Object.defineProperty'] }]]

Or an opt-in-only whitelist:

plugins: [['transform-runtime', { include: ['Object.assign', 'String.*', 'Math.*'] }]]

The specific use case that came up for me now was excluding the Promise polyfill in particular since SystemJS by default has a polyfill present already.

The nice thing is this would enable the creation of runtime transformer presets which can be based on various engine support baselines.