gzip responses in adapter-node

[benmccann]

Closes #345

[samccone]

Make sure to follow this process: #331 (comment) in order to generate a new version of the package.

[samccone]

Make sure to follow this process: #331 (comment) in order to generate a new version of the package.

The only step remaining is this ^, then feel free to merge. Thanks Ben!!

[Rich-Harris]

Is compression the right package to use here? If we're offering compression OOTB isn't brotli better than gzip?

[benmccann]

I was weary of reimplementing compression in our own code. It's a battle-tested library and compressing ourselves isn't quite as simple as just calling gzip/brotli since they need to do a bunch of stuff like content negotiation, considering cache headers, etc. The picture becomes more complicated when we want to support both gzip and Brotli

I looked at Brotli, but unfortunately compression doesn't support Brotli yet. There are a couple PRs in progress so hopefully we can just bump the library in a couple months to get support

[hfjallemark]

Is there any way to disable gzip compression? We're running Cloudflare and it won't compress responses to brotli if they are already gzipped by the origin.