CrateReadme: Use highlight-syntax modifier

Author: Turbo87

app/components/crate-readme.js

@@ -1,13 +1,7 @@
 import Component from '@ember/component';
 
 export default Component.extend({
-  rendered: '',
-
-  didRender() {
-    this._super(...arguments);
+  tagName: '',
 
-    this.element.querySelectorAll('pre > code').forEach(function(node) {
-      window.Prism.highlightElement(node);
-    });
-  },
+  rendered: '',
 });

app/templates/components/crate-readme.hbs

@@ -1 +1,3 @@
-{{html-safe this.rendered}}
+<div {{highlight-syntax selector="pre > code"}} data-test-readme>
+  {{html-safe this.rendered}}
+</div>