make SignallingMessage in .d.ts match that used by the class
make SignallingMessage in .d.ts match that used by the class

uProxy/uproxy,jpevarnek/uproxy,uProxy/uproxy,jpevarnek/uproxy,uProxy/uproxy,uProxy/uproxy,uProxy/uproxy,jpevarnek/uproxy,jpevarnek/uproxy,jpevarnek/uproxy