Refactor cacher middleware to use Cache API

[sejori]

https://developer.mozilla.org/en-US/docs/Web/API/Cache

https://deno.land/api@v1.37.2?s=Cache

[sejori]

https://developers.cloudflare.com/workers/runtime-apis/cache/

[sejori]

https://developer.mozilla.org/en-US/docs/Web/API/Cache

[sejori]

An issue with using the Web Cache API is that it wouldn't work well for graphql where two different queries could ask for the same/similar data. We can cache at the request level but it wouldn't effectively serve this case.

We will need caching to support dataloaders/query resolvers. Unless, we resolve a GraphQL query with multiple load requests under-the-hood. Which could work actually...

[sejori]

^ This would make doing federated graphQL a lot easier as well.