Switched Nodejs version

Node Printer Releases vs Node js 7.9

Win32 x64
Win32 ia32
Electron 1.2.x x32
Electron 1.2.x x64
Electron 1.3.x ia32
Electron 1.3.x x64
Electron 1.4.x ia32
Electron 1.4.x x64
Electron 1.6.x ia32
Electron 1.6.x x64