Issue jetty#11803 - Follow Reactive Streams specification

Author: scrat98

jetty-core/jetty-io/pom.xml

@@ -41,6 +41,11 @@
       <artifactId>jetty-test-helper</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.reactivestreams</groupId>
+      <artifactId>reactive-streams-tck-flow</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
   <build>
     <plugins>