reactor upgrade (#458)

Author: yschimke

rsocket-transport-netty/build.gradle

@@ -17,10 +17,10 @@
 dependencies {
     compile project(':rsocket-core')
     compile "io.projectreactor.ipc:reactor-netty:0.7.2.RELEASE"
-    compile "io.netty:netty-handler:4.1.17.Final"
-    compile "io.netty:netty-handler-proxy:4.1.17.Final"
-    compile "io.netty:netty-codec-http:4.1.17.Final"
-    compile "io.netty:netty-transport-native-epoll:4.1.17.Final"
+    compile "io.netty:netty-handler:4.1.19.Final"
+    compile "io.netty:netty-handler-proxy:4.1.19.Final"
+    compile "io.netty:netty-codec-http:4.1.19.Final"
+    compile "io.netty:netty-transport-native-epoll:4.1.19.Final"
 
     testCompile project(':rsocket-test')
 }