Prettier: Upgrade to 2 (#30387)

* Updated package json but not updated source files

* Update eslint plugin

* updated files

public/app/core/components/info_popover.ts

@@ -28,7 +28,7 @@ export function infoPopover() {
         const content = document.createElement('div');
         content.className = 'markdown-html';
 
-        _.each(clone, node => {
+        _.each(clone, (node) => {
           content.appendChild(node);
         });