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/PinchZoom.js

@@ -1,16 +1,16 @@
 /**
  * @module ol/interaction/PinchZoom
  */
+import PointerInteraction, {
+  centroid as centroidFromPointers,
+} from './Pointer.js';
 import {FALSE} from '../functions.js';
-import PointerInteraction, {centroid as centroidFromPointers} from './Pointer.js';
-
 
 /**
  * @typedef {Object} Options
  * @property {number} [duration=400] Animation duration in milliseconds.
  */
 
-
 /**
  * @classdesc
  * Allows the user to zoom the map by pinching with two fingers
@@ -22,7 +22,6 @@ class PinchZoom extends PointerInteraction {
    * @param {Options=} opt_options Options.
    */
   constructor(opt_options) {
-
     const options = opt_options ? opt_options : {};
 
     const pointerOptions = /** @type {import("./Pointer.js").Options} */ (options);
@@ -56,7 +55,6 @@ class PinchZoom extends PointerInteraction {
      * @type {number}
      */
     this.lastScaleDelta_ = 1;
-
   }
 
   /**
@@ -79,7 +77,6 @@ class PinchZoom extends PointerInteraction {
     }
     this.lastDistance_ = distance;
 
-
     const map = mapBrowserEvent.map;
     const view = map.getView();