Improved package.json.
Improved package.json.

vconsult/JsSIP,dpocock/JsSIP,onsip/SIP.js,josephfrazier/SIP.js,rusekr/JsSIP,onsip/SIP.js,Voiceworks/SIP.js,CodeYellowBV/JsSIP,tqcenglish/JsSIP,voxbone/JsSIP,markandrus/SIP.js,DrumTechnologiesLtd/JsSIP,Escaux/SIP.js,ronlobo/SIP.js,AaronZhangL/JsSIP,joseph-onsip/SIP.js