Add useSubscription

Author: rubengrill

src/reactHooks.ts

@@ -8,6 +8,7 @@ declare module "@apollo/react-hooks" {
     MutationHookOptions,
     MutationTuple,
     QueryHookOptions,
+    SubscriptionHookOptions,
   } from "@apollo/react-hooks/lib/types";
 
   export * from "@apollo/react-hooks/lib/index";
@@ -29,4 +30,18 @@ declare module "@apollo/react-hooks" {
     mutation: TypedDocumentNode<TVariables, TData>,
     options?: TOptions
   ): MutationTuple<TData, TVariables>;
+
+  export function useSubscription<
+    TData,
+    TVariables extends OperationVariables,
+    TOptions extends SubscriptionHookOptions<TData, TVariables>
+  >(
+    subscription: TypedDocumentNode<TVariables, TData>,
+    options?: TOptions
+  ): {
+    variables: TVariables | undefined;
+    loading: boolean;
+    data?: TData | undefined;
+    error?: import("apollo-client").ApolloError | undefined;
+  };
 }