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.

rendering/cases/immediate-geographic/main.js

@@ -1,10 +1,10 @@
+import TileLayer from '../../../src/ol/layer/Tile.js';
+import XYZ from '../../../src/ol/source/XYZ.js';
+import {Circle, Fill, Style} from '../../../src/ol/style.js';
 import {Map, View} from '../../../src/ol/index.js';
 import {Point} from '../../../src/ol/geom.js';
-import TileLayer from '../../../src/ol/layer/Tile.js';
-import {useGeographic} from '../../../src/ol/proj.js';
-import XYZ from '../../../src/ol/source/XYZ.js';
-import {Style, Circle, Fill} from '../../../src/ol/style.js';
 import {getVectorContext} from '../../../src/ol/render.js';
+import {useGeographic} from '../../../src/ol/proj.js';
 
 useGeographic();
 
@@ -13,18 +13,20 @@ const center = [8.6, 50.1];
 const layer = new TileLayer({
   source: new XYZ({
     url: '/data/tiles/satellite/{z}/{x}/{y}.jpg',
-    transition: 0
-  })
+    transition: 0,
+  }),
 });
 
-layer.on('postrender', event => {
+layer.on('postrender', (event) => {
   const context = getVectorContext(event);
-  context.setStyle(new Style({
-    image: new Circle({
-      radius: 5,
-      fill: new Fill({color: 'red'})
+  context.setStyle(
+    new Style({
+      image: new Circle({
+        radius: 5,
+        fill: new Fill({color: 'red'}),
+      }),
     })
-  }));
+  );
   context.drawGeometry(new Point(center));
 });
 
@@ -33,8 +35,8 @@ new Map({
   layers: [layer],
   view: new View({
     center: center,
-    zoom: 3
-  })
+    zoom: 3,
+  }),
 });
 
 render();