Merge pull request #879 from hypothesis/dependabot/npm_and_yarn/postcss-url-8.0.0

Bump postcss-url from 5.1.2 to 8.0.0

gulpfile.js

@@ -149,8 +149,8 @@ const styleFiles = [
 gulp.task('build-css', function () {
   // Rewrite font URLs to look for fonts in 'build/fonts' instead of
   // 'build/styles/fonts'
-  function rewriteCSSURL(url) {
-    return url.replace(/^fonts\//, '../fonts/');
+  function rewriteCSSURL(asset) {
+    return asset.url.replace(/^fonts\//, '../fonts/');
   }
 
   const sassOpts = {

package.json

@@ -83,7 +83,7 @@
     "node-uuid": "^1.4.3",
     "npm-packlist": "^1.1.12",
     "postcss": "^7.0.13",
-    "postcss-url": "^5.1.1",
+    "postcss-url": "^8.0.0",
     "proxyquire": "^1.7.10",
     "proxyquire-universal": "^1.0.8",
     "proxyquireify": "^3.2.1",