Outdated dependencies and manual config when working with shadow-cljs

[madis]

Currently there's some manual effort needed to get this library working with shadow-cljs. Worth considering incorporating some of this into the codebase:

Writing it down so that I don't forget and that me or someone else could use it as basis for changes.

Missing nodejs dependencies & externs

The following currently have to be added to package.json

"apollo-fetch": "^0.7.0",
"dataloader": "^1.4.0",
"graphql": "^15.5.0",
"process": "^0.11.10",

And three files have to be created (and incorporated into the build) to make the objects these libraries expose, available:

1. src/cljsjs/apollo_fetch.cljs:

(ns cljsjs.apollo-fetch
  (:require ["apollo-fetch" :as af]))

(js/goog.exportSymbol "apolloFetch" af)

2. src/cljsjs/dataloader.cljs

(ns cljsjs.dataloader
  (:require ["dataloader" :as dl]))

(js/goog.exportSymbol "DataLoader" dl)

3. src/cljsjs/graphql.cljs

(ns cljsjs.graphql
  (:require ["graphql" :as gql]))

(js/goog.exportSymbol "GraphQL" gql)