Update readme

Author: matpeder

README.md

@@ -12,6 +12,15 @@ yarn add --dev vue-template-compiler vue-svg-loader
 {
   test: /\.svg$/,
   loader: 'vue-svg-loader', // `vue-svg` for webpack 1.x
+  options: {
+    // optional [svgo](https://github.com/svg/svgo) options
+    svgo: {
+      plugins: [
+        {removeDoctype: true},
+        {removeComments: true}
+      ]
+    }
+  }
 }
 ```