package.json: Update node version to 0.12.x
package.json: Update node version to 0.12.x

iizukanao/node-rtsp-rtmp-server,PeterBLITZ/node-rtsp-rtmp-server,iizukanao/node-rtsp-rtmp-server,danielfree/node-rtsp-rtmp-server,atyenoria/node-rtsp-rtmp-server,PeterBLITZ/node-rtsp-rtmp-server,danielfree/node-rtsp-rtmp-server,atyenoria/node-rtsp-rtmp-server