Fix #895 - Run Node.js scripts with node.exe instead of node on Windows

test/fixers/test_standard_fixer_callback.vader

@@ -25,7 +25,7 @@ Execute(The standard fixer with standard.js should be run with node on Windows):
   AssertEqual
   \ {
   \   'read_temporary_file': 1,
-  \   'command': 'node '
+  \   'command': ale#Escape('node.exe') . ' '
   \     . ale#Escape(simplify(g:dir . '/../eslint-test-files/react-app/node_modules/standard/bin/cmd.js'))
   \     . ' --fix %t',
   \ },