allow customisation for extensions type (#6969)

* Allow customization for extensions type

This introduces a new configuration for the `graphql-request` plugin for
typescript. It allows to use `unknown` (or a custom type) instead of
`any` for the `extensions` parameter without breaking changes.

* Add changeset

* Add tests for extensionsType config

.changeset/poor-seas-swim.md

@@ -0,0 +1,5 @@
+---
+'@graphql-codegen/typescript-graphql-request': minor
+---
+
+Add the extensionsType config in order to change the default type for extensions when rawRequest is true.

packages/plugins/typescript/graphql-request/src/config.ts

@@ -22,4 +22,17 @@ export interface RawGraphQLRequestPluginConfig extends RawClientSideBasePluginCo
    * ```
    */
   rawRequest?: boolean;
+
+  /**
+   * @description Allows you to override the type for extensions when `rawRequest` is enabled.
+   * @default any
+   *
+   * @exampleMarkdown
+   * ```yml
+   * config:
+   *   rawRequest: true
+   *   extensionsType: unknown
+   * ```
+   */
+  extensionsType?: string;
 }

packages/plugins/typescript/graphql-request/src/visitor.ts

@@ -12,6 +12,7 @@ import { RawGraphQLRequestPluginConfig } from './config';
 
 export interface GraphQLRequestPluginConfig extends ClientSideBasePluginConfig {
   rawRequest: boolean;
+  extensionsType: string;
 }
 
 const additionalExportedTypes = `
@@ -33,6 +34,7 @@ export class GraphQLRequestVisitor extends ClientSideBaseVisitor<
   constructor(schema: GraphQLSchema, fragments: LoadedFragment[], rawConfig: RawGraphQLRequestPluginConfig) {
     super(schema, fragments, rawConfig, {
       rawRequest: getConfigValue(rawConfig.rawRequest, false),
+      extensionsType: getConfigValue(rawConfig.extensionsType, "any"),
     });
 
     autoBind(this);
@@ -111,7 +113,7 @@ export class GraphQLRequestVisitor extends ClientSideBaseVisitor<
             o.operationVariablesTypes
           }, requestHeaders?: Dom.RequestInit["headers"]): Promise<{ data?: ${
             o.operationResultType
-          } | undefined; extensions?: any; headers: Dom.Headers; status: number; errors?: GraphQLError[] | undefined; }> {
+          } | undefined; extensions?: ${this.config.extensionsType}; headers: Dom.Headers; status: number; errors?: GraphQLError[] | undefined; }> {
     return withWrapper((wrappedRequestHeaders) => client.rawRequest<${
       o.operationResultType
     }>(${docArg}, variables, {...requestHeaders, ...wrappedRequestHeaders}), '${operationName}');