错误捕获，handler关闭

Author: boneVidy

.npmignore

@@ -0,0 +1,6 @@
+node_modules/
+build/
+.vscode
+.gitignore
+.npmignore
+.test.js

README.md

@@ -7,7 +7,7 @@ const escpos =require('node-escpos-addon');
 const usblist = escpos.GetUsbDeviceList();
 const printer = usblist.find(item => item.service ==='usbprint' || item.deviceName==='USB 打印支持');
 const content = iconv.encode("你好啊\n halo cpp!\\n\n\n\n\nn\n\n\n\n", 'GB18030');
-escpos.PrintRaw(printer.path, content);
+const {success, err} = escpos.PrintRaw(printer.path, content);
 ```
 
 
@@ -18,5 +18,5 @@ const escpos =require('node-escpos-addon');
 const lptList = escpos.GetLptDeviceList();
 const printer = lptList[0];
 const content = iconv.encode("你好啊\n halo cpp!\\n\n\n\n\nn\n\n\n\n", 'GB18030');
-escpos.PrintRaw(printer.path, content);
+const {success, err} = escpos.PrintRaw(printer.path, content);
 ```