Update version.h

Increase protocol version to 70220

Author: miningplanet

src/version.h

@@ -12,7 +12,7 @@
  */
 
 
-static const int PROTOCOL_VERSION = 70218;
+static const int PROTOCOL_VERSION = 70220;
 
 //! initial proto version, to be increased after version/verack negotiation
 static const int INIT_PROTO_VERSION = 209;