Yudai Kobayashi

## Describe the enhancement [docs/BUNDLERS_INTEGRATION.md#webpack](https://github.com/callstack/linaria/blob/master/docs/BUNDLERS_INTEGRATION.md#webpack) shows an example of webpack config. Now it says: ```js const webpack = require('webpack'); const path = require('path'); const MiniCssExtractPlugin = require('mini-css-extract-plugin'); const dev =...