Add a way to access context headers in the cache key for caching

[paales]

Is your feature request related to a problem? Please describe.

I'm trying to add caching to one of our requests that is requested very often and I want to add a request header to the cache key. We're adding headers like { "store": "nl_NL" }

To achieve this I presume I need to access the context, but the documentatino doesn't mention anything about it. https://graphql-mesh.com/docs/transforms/cache

I've tried using the context but that doesn't work:
{typeName}-{fieldName}-{argsHash}-{fieldNamesHash}-{context.req.headers.store}

It seems it isn't used for calculating the cache key https://github.com/Urigo/graphql-mesh/blob/master/packages/transforms/cache/src/compute-cache-key.ts

Describe the solution you'd like

Pass the context to the computeCacheKey method and make it available
https://github.com/Urigo/graphql-mesh/blob/master/packages/transforms/cache/src/index.ts#L37-L42

Describe alternatives you've considered

Maybe it is already possible in some way, but would be nice if there was a mention in the docs somewhere :)

Additional context

[paales]

Although the issue is still valid that it isn't able to use headers, we've found a workaround (do some caching at the ApolloClient)