enabled scoped option emit error in Windows

[ytkj]

• lib/template-loader.js:61

const loaderPath = require.resolve('./scoped-style-loader.js')
return `var styles = require('${loaderPath}?id=${id}!${stylePath}')`

In Windows environments, the cumputed value of ${loaderPath} is 'C:\path\to\scoped-style-loader.js', not 'C:\\path\\to\\scoped-style-loader.js'.
Some characters such as '\t', for example, is escaped unexpectedly.

As a result, error "unable to resolve module 'C:\athoscoped-style-loader.js'" is emitted.