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.

examples/min-zoom.js

@@ -1,7 +1,7 @@
 import Map from '../src/ol/Map.js';
-import View from '../src/ol/View.js';
-import TileLayer from '../src/ol/layer/Tile.js';
 import OSM from '../src/ol/source/OSM.js';
+import TileLayer from '../src/ol/layer/Tile.js';
+import View from '../src/ol/View.js';
 
 const viewport = document.getElementById('map');
 
@@ -15,20 +15,20 @@ const initialZoom = getMinZoom();
 const view = new View({
   center: [0, 0],
   minZoom: initialZoom,
-  zoom: initialZoom
+  zoom: initialZoom,
 });
 
 const map = new Map({
   layers: [
     new TileLayer({
-      source: new OSM()
-    })
+      source: new OSM(),
+    }),
   ],
   target: 'map',
-  view: view
+  view: view,
 });
 
-window.addEventListener('resize', function() {
+window.addEventListener('resize', function () {
   const minZoom = getMinZoom();
   if (minZoom !== view.getMinZoom()) {
     view.setMinZoom(minZoom);