fix: concat directory separators instead of "/" to make it work on Windows #39 (#40)

Author: Gohan

src/index.js

@@ -29,7 +29,7 @@ export default function loader(content) {
 
   return `
 try {
-  process.dlopen(module, __dirname + "/" + __webpack_public_path__ + ${JSON.stringify(
+  process.dlopen(module, __dirname + require("path").sep + __webpack_public_path__ + ${JSON.stringify(
     name
   )}${
     typeof options.flags !== 'undefined'

test/__snapshots__/loader.test.js.snap

@@ -5,7 +5,7 @@ exports[`loader should throw an error on broken "node" addon: errors 1`] = `Arra
 exports[`loader should throw an error on broken "node" addon: module 1`] = `
 "
 try {
-  process.dlopen(module, __dirname + \\"/\\" + __webpack_public_path__ + \\"broken.node\\");
+  process.dlopen(module, __dirname + require(\\"path\\").sep + __webpack_public_path__ + \\"broken.node\\");
 } catch (error) {
   throw new Error('node-loader:\\\\n' + error);
 }
@@ -19,7 +19,7 @@ exports[`loader should work: errors 1`] = `Array []`;
 exports[`loader should work: module 1`] = `
 "
 try {
-  process.dlopen(module, __dirname + \\"/\\" + __webpack_public_path__ + \\"hello.node\\", 1);
+  process.dlopen(module, __dirname + require(\\"path\\").sep + __webpack_public_path__ + \\"hello.node\\", 1);
 } catch (error) {
   throw new Error('node-loader:\\\\n' + error);
 }