Change async-retry options to use retry library types

Since async-retry is passing options parameter directly to the underlying retry library, option types can be reused from it.

types/async-retry/async-retry-tests.ts

@@ -7,6 +7,7 @@ const o: Options = {
   minTimeout: 3,
   maxTimeout: 4,
   randomize: true,
+  forever: false,
   onRetry: (e: Error) => 42
 };
 

types/async-retry/index.d.ts

@@ -1,21 +1,19 @@
-// Type definitions for async-retry 1.3
+// Type definitions for async-retry 1.4
 // Project: https://github.com/zeit/async-retry#readme
 // Definitions by: Albert Wu <https://github.com/albertywu>
 //                 Pablo Rodríguez <https://github.com/MeLlamoPablo>
+//                 Rafał Sawicki <https://github.com/rafsawicki>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
+import { OperationOptions } from 'retry';
+
 declare function AsyncRetry<A>(
 	fn: AsyncRetry.RetryFunction<A>,
 	opts: AsyncRetry.Options
 ): Promise<A>;
 
 declare namespace AsyncRetry {
-	interface Options {
-		retries?: number;
-		factor?: number;
-		minTimeout?: number;
-		maxTimeout?: number;
-		randomize?: boolean;
+	interface Options extends OperationOptions {
 		onRetry?: (e: Error, attempt: number) => any;
 	}