Update documentation

README.md

@@ -1,6 +1,6 @@
 # @ppstreams/propagate-abort
 
-A simple abort handler for ppstreams that just passes on an incoming abort notification to the source stream.
+A simple abort handler for ppstreams that just passes on an incoming abort notification to the direct upstream.
 
 ## Example:
 
@@ -8,6 +8,7 @@ A simple abort handler for ppstreams that just passes on an incoming abort notif
 "use strict";
 
 const propagateAbort = require("@ppstreams/propagate-abort");
+const propagatePeek = require("@ppstreams/propagate-peek");
 
 module.exports = function makeStream() {
 	return {
@@ -16,7 +17,8 @@ module.exports = function makeStream() {
 			/* This example stream just passes through the upstream value */
 			return source.read();
 		},
-		abort: propagateAbort
+		abort: propagateAbort,
+		peek: propagatePeek
 	}
 };
 ```