···11----
22-'@urql/core': patch
33----
44-55-Fix format of `map` form data field on multipart upload requests. This was erroneously set to a string rather than a string tuple.
···11# @urql/core
2233+## 4.0.1
44+55+### Patch Changes
66+77+- ⚠️ Fix format of `map` form data field on multipart upload requests. This was erroneously set to a string rather than a string tuple
88+ Submitted by [@kitten](https://github.com/kitten) (See [#3118](https://github.com/urql-graphql/urql/pull/3118))
99+310## 4.0.0
411512### Major Changes
···815 In doing so we make the `urql` package more tree-shakeable as the three default exchanges are in no code paths
916 meaning they can be removed if not used.
1017 A migration would look as follows if you are currently creating a client without exchanges
1818+1119 ```js
1220 import { createClient, cacheExchange, fetchExchange } from '@urql/core';
1321···1624 exchanges: [cacheExchange, fetchExchange],
1725 });
1826 ```
2727+1928 Submitted by [@JoviDeCroock](https://github.com/JoviDeCroock) (See [#3033](https://github.com/urql-graphql/urql/pull/3033))
2929+2030- Update `subscriptionExchange` to receive `FetchBody` instead. In the usual usage of `subscriptionExchange` (for instance with `graphql-ws`) you can expect no breaking changes. However, the `key` and `extensions` field has been removed and instead the `forwardSubscription` function receives the full `Operation` as a second argument
2131 Submitted by [@kitten](https://github.com/kitten) (See [#3054](https://github.com/urql-graphql/urql/pull/3054))
2232- Remove dependence on `graphql` package and replace it with `@0no-co/graphql.web`, which reduces the default bundlesize impact of `urql` packages to a minimum. All types should remain compatible, even if you use `graphql` elsewhere in your app, and if other dependencies are using `graphql` you may alias it to `graphql-web-lite`
+1-1
packages/core/package.json
···11{
22 "name": "@urql/core",
33- "version": "4.0.0",
33+ "version": "4.0.1",
44 "description": "The shared core for the highly customizable and versatile GraphQL client",
55 "sideEffects": false,
66 "homepage": "https://formidable.com/open-source/urql/docs/",