react webpack 配置less

修改 config/webpack.config 文件

修改两处：
1.找到 “const sassRegex =” 添加以下代码

const lessRegex = /\.less$/;
const lessModuleRegex = /\.module\.less$/;

2. 找到 “test: sassRegex”

//Adds less for less Modules, but using less
              {
                  test: lessRegex,
                  exclude: lessModuleRegex,
                  use: getStyleLoaders({ importLoaders: 2 }, 'less-loader'),
              },
              {
                  test: lessModuleRegex,
                  use: getStyleLoaders(
                      {
                          importLoaders: 2,
                          modules: true,
                          getLocalIdent: getCSSModuleLocalIdent,
                      },
                      'less-loader'
                  ),
              },