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/wms-tiled-wrap-180.js

@@ -1,27 +1,26 @@
 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 TileWMS from '../src/ol/source/TileWMS.js';
-
+import View from '../src/ol/View.js';
 
 const layers = [
   new TileLayer({
-    source: new OSM()
+    source: new OSM(),
   }),
   new TileLayer({
     source: new TileWMS({
       url: 'https://ahocevar.com/geoserver/ne/wms',
       params: {'LAYERS': 'ne:ne_10m_admin_0_countries', 'TILED': true},
-      serverType: 'geoserver'
-    })
-  })
+      serverType: 'geoserver',
+    }),
+  }),
 ];
 const map = new Map({
   layers: layers,
   target: 'map',
   view: new View({
     center: [0, 0],
-    zoom: 1
-  })
+    zoom: 1,
+  }),
 });