Make code prettier

This updates ESLint and our shared eslint-config-openlayers to use Prettier.  Most formatting changes were automatically applied with this:

    npm run lint -- --fix

A few manual changes were required:

 * In `examples/offscreen-canvas.js`, the `//eslint-disable-line` comment needed to be moved to the appropriate line to disable the error about the `'worker-loader!./offscreen-canvas.worker.js'` import.
 * In `examples/webpack/exapmle-builder.js`, spaces could not be added after a couple `function`s for some reason.  While editing this, I reworked `ExampleBuilder` to be a class.
 * In `src/ol/format/WMSGetFeatureInfo.js`, the `// @ts-ignore` comment needed to be moved down one line so it applied to the `parsersNS` argument.

src/ol/interaction/Interaction.js

@@ -2,9 +2,8 @@
  * @module ol/interaction/Interaction
  */
 import BaseObject from '../Object.js';
-import {easeOut, linear} from '../easing.js';
 import InteractionProperty from './Property.js';
-
+import {easeOut, linear} from '../easing.js';
 
 /**
  * Object literal with config options for interactions.
@@ -17,7 +16,6 @@ import InteractionProperty from './Property.js';
  * are traversed in reverse order of the interactions collection of the map.
  */
 
-
 /**
  * @classdesc
  * Abstract base class; normally only used for creating subclasses and not
@@ -101,7 +99,6 @@ class Interaction extends BaseObject {
   }
 }
 
-
 /**
  * @param {import("../View.js").default} view View.
  * @param {import("../coordinate.js").Coordinate} delta Delta.
@@ -114,7 +111,7 @@ export function pan(view, delta, opt_duration) {
     view.animateInternal({
       duration: opt_duration !== undefined ? opt_duration : 250,
       easing: linear,
-      center: view.getConstrainedCenter(center)
+      center: view.getConstrainedCenter(center),
     });
   }
 }
@@ -142,7 +139,7 @@ export function zoomByDelta(view, delta, opt_anchor, opt_duration) {
     resolution: newResolution,
     anchor: opt_anchor,
     duration: opt_duration !== undefined ? opt_duration : 250,
-    easing: easeOut
+    easing: easeOut,
   });
 }