Feature request: allow setting esbuild keepNames options

[canac]

- Do you want to request a feature or report a bug?

Feature request

- What is the current behavior?

My app uses a module that checks the functions' name property during validation (https://github.com/graphql-compose/graphql-compose-mongoose/blob/e4b916bf4c7a2e8857345ac9476d4e76bc25e030/src/resolvers/findById.ts#L42-L44). By default, esbuild renames functions during bundling, which changes their name property, which causes that check to fail.

- What is the expected behavior?

There is --keep-names option in esbuild that keeps function names from being changed, which is exactly what I need. Can the zip-it-and-ship-it esbuild bundler expose that option?

[natevw]

Yes, this would also enable working around this issue with older versions of node-fetch which e.g. googleapis still rely on: node-fetch/node-fetch#784 (comment)