chore(postcss-svgo): require the latest svgo

svgo has removed one export that we were using in tests. Update the test
and require the latest svgo for safety.

packages/postcss-svgo/package.json

@@ -31,7 +31,7 @@
   "repository": "cssnano/cssnano",
   "dependencies": {
     "postcss-value-parser": "^4.1.0",
-    "svgo": "^2.7.0"
+    "svgo": "^2.8.0"
   },
   "bugs": {
     "url": "https://github.com/cssnano/cssnano/issues"

packages/postcss-svgo/src/__tests__/index.js

@@ -1,7 +1,6 @@
 import { readFileSync as file } from 'fs';
 import postcss from 'postcss';
 import filters from 'pleeease-filters';
-import { extendDefaultPlugins } from 'svgo';
 import plugin from '../';
 import { encode, decode } from '../lib/url';
 import {
@@ -108,9 +107,16 @@ test(
     'h1{background:url(\'data:image/svg+xml;utf-8,<?xml version="1.0" encoding="utf-8"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xml:space="preserve"><circle cx="50" cy="50" r="40" fill="yellow" /><!--test comment--></svg>\')}',
     'h1{background:url(\'data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve"><circle cx="50" cy="50" r="40" fill="%23ff0"/><!--test comment--></svg>\')}',
     {
-      plugins: extendDefaultPlugins([
-        { name: 'removeComments', active: false },
-      ]),
+      plugins: [
+        {
+          name: 'preset-default',
+          params: {
+            overrides: {
+              removeComments: false,
+            },
+          },
+        },
+      ],
     }
   )
 );

yarn.lock

@@ -7762,7 +7762,7 @@ supports-hyperlinks@^2.0.0:
     has-flag "^4.0.0"
     supports-color "^7.0.0"
 
-svgo@^2.7.0:
+svgo@^2.8.0:
   version "2.8.0"
   resolved "https://registry.yarnpkg.com/svgo/-/svgo-2.8.0.tgz#4ff80cce6710dc2795f0c7c74101e6764cfccd24"
   integrity sha512-+N/Q9kV1+F+UeWYoSiULYo4xYSDQlTgb+ayMobAXPwMnLvop7oxKMo9OzIrX5x3eS4L4f2UHhc9axXwY8DpChg==