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/localized-openstreetmap.js

@@ -1,41 +1,37 @@
 import Map from '../src/ol/Map.js';
-import View from '../src/ol/View.js';
-import TileLayer from '../src/ol/layer/Tile.js';
 import OSM, {ATTRIBUTION} from '../src/ol/source/OSM.js';
-
+import TileLayer from '../src/ol/layer/Tile.js';
+import View from '../src/ol/View.js';
 
 const openCycleMapLayer = new TileLayer({
   source: new OSM({
     attributions: [
       'All maps © <a href="https://www.opencyclemap.org/">OpenCycleMap</a>',
-      ATTRIBUTION
+      ATTRIBUTION,
     ],
-    url: 'https://{a-c}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png' +
-        '?apikey=0e6fc415256d4fbb9b5166a718591d71'
-  })
+    url:
+      'https://{a-c}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png' +
+      '?apikey=0e6fc415256d4fbb9b5166a718591d71',
+  }),
 });
 
 const openSeaMapLayer = new TileLayer({
   source: new OSM({
     attributions: [
       'All maps © <a href="http://www.openseamap.org/">OpenSeaMap</a>',
-      ATTRIBUTION
+      ATTRIBUTION,
     ],
     opaque: false,
-    url: 'https://tiles.openseamap.org/seamark/{z}/{x}/{y}.png'
-  })
+    url: 'https://tiles.openseamap.org/seamark/{z}/{x}/{y}.png',
+  }),
 });
 
-
 const map = new Map({
-  layers: [
-    openCycleMapLayer,
-    openSeaMapLayer
-  ],
+  layers: [openCycleMapLayer, openSeaMapLayer],
   target: 'map',
   view: new View({
     maxZoom: 18,
     center: [-244780.24508882355, 5986452.183179816],
-    zoom: 15
-  })
+    zoom: 15,
+  }),
 });