Use the extended handshake to enable protocol 4.2

Author: bigmontz

src/internal/protocol-handshaker.js

@@ -156,7 +156,7 @@ function newHandshakeBuffer () {
   handshakeBuffer.writeInt32(BOLT_MAGIC_PREAMBLE)
 
   // proposed versions
-  handshakeBuffer.writeInt32((3 << 8) | 4)
+  handshakeBuffer.writeInt32((1 << 16) | (3 << 8) | 4)
   handshakeBuffer.writeInt32((1 << 8) | 4)
   handshakeBuffer.writeInt32(4)
   handshakeBuffer.writeInt32(3)

test/internal/protocol-handshaker.test.js

@@ -44,7 +44,7 @@ describe('#unit ProtocolHandshaker', () => {
     expect(writtenBuffers.length).toEqual(1)
 
     const boltMagicPreamble = '60 60 b0 17'
-    const protocolVersion4x3 = '00 00 03 04'
+    const protocolVersion4x3 = '00 01 03 04'
     const protocolVersion4x1 = '00 00 01 04'
     const protocolVersion4x0 = '00 00 00 04'
     const protocolVersion3 = '00 00 00 03'