Refactored to use StreamableWriter

Bumped the msgpack library to 2.0.1 (the 2.0.0 build was fubar)

networking/src/main/kotlin/ch/dissem/bitmessage/networking/nio/ConnectionIO.kt

@@ -61,7 +61,7 @@ class ConnectionIO(
         if (!headerOut.hasRemaining() && !sendingQueue.isEmpty()) {
             headerOut.clear()
             val payload = sendingQueue.poll()
-            payloadOut = NetworkMessage(payload).writeHeaderAndGetPayloadBuffer(headerOut)
+            payloadOut = NetworkMessage(payload).writer().writeHeaderAndGetPayloadBuffer(headerOut)
             headerOut.flip()
             lastUpdate = System.currentTimeMillis()
         }

networking/src/main/kotlin/ch/dissem/bitmessage/networking/nio/NioNetworkHandler.kt

@@ -90,7 +90,7 @@ class NioNetworkHandler : NetworkHandler, InternalContext.ContextHolder {
         SocketChannel.open(InetSocketAddress(server, port)).use { channel ->
             channel.configureBlocking(true)
             val headerBuffer = ByteBuffer.allocate(HEADER_SIZE)
-            val payloadBuffer = NetworkMessage(request).writeHeaderAndGetPayloadBuffer(headerBuffer)
+            val payloadBuffer = NetworkMessage(request).writer().writeHeaderAndGetPayloadBuffer(headerBuffer)
             headerBuffer.flip()
             while (headerBuffer.hasRemaining()) {
                 channel.write(headerBuffer)

networking/src/test/kotlin/ch/dissem/bitmessage/networking/TestNodeRegistry.kt

@@ -38,4 +38,16 @@ internal class TestNodeRegistry(vararg nodes: NetworkAddress) : NodeRegistry {
     override fun offerAddresses(nodes: List<NetworkAddress>) {
         // Ignore
     }
+
+    override fun update(node: NetworkAddress) {
+        // Ignore
+    }
+
+    override fun remove(node: NetworkAddress) {
+        // Ignore
+    }
+
+    override fun cleanup() {
+        // Ignore
+    }
 }