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/sphere-mollweide.js

@@ -1,25 +1,31 @@
+import GeoJSON from '../src/ol/format/GeoJSON.js';
 import Graticule from '../src/ol/layer/Graticule.js';
 import Map from '../src/ol/Map.js';
-import View from '../src/ol/View.js';
-import GeoJSON from '../src/ol/format/GeoJSON.js';
-import VectorLayer from '../src/ol/layer/Vector.js';
 import Projection from '../src/ol/proj/Projection.js';
+import VectorLayer from '../src/ol/layer/Vector.js';
 import VectorSource from '../src/ol/source/Vector.js';
-import {register} from '../src/ol/proj/proj4.js';
+import View from '../src/ol/View.js';
 import proj4 from 'proj4';
+import {register} from '../src/ol/proj/proj4.js';
 
-
-proj4.defs('ESRI:53009', '+proj=moll +lon_0=0 +x_0=0 +y_0=0 +a=6371000 ' +
-    '+b=6371000 +units=m +no_defs');
+proj4.defs(
+  'ESRI:53009',
+  '+proj=moll +lon_0=0 +x_0=0 +y_0=0 +a=6371000 ' +
+    '+b=6371000 +units=m +no_defs'
+);
 register(proj4);
 
 // Configure the Sphere Mollweide projection object with an extent,
 // and a world extent. These are required for the Graticule.
 const sphereMollweideProjection = new Projection({
   code: 'ESRI:53009',
-  extent: [-18019909.21177587, -9009954.605703328,
-    18019909.21177587, 9009954.605703328],
-  worldExtent: [-179, -89.99, 179, 89.99]
+  extent: [
+    -18019909.21177587,
+    -9009954.605703328,
+    18019909.21177587,
+    9009954.605703328,
+  ],
+  worldExtent: [-179, -89.99, 179, 89.99],
 });
 
 const map = new Map({
@@ -28,15 +34,15 @@ const map = new Map({
     new VectorLayer({
       source: new VectorSource({
         url: 'data/geojson/countries-110m.geojson',
-        format: new GeoJSON()
-      })
+        format: new GeoJSON(),
+      }),
     }),
-    new Graticule()
+    new Graticule(),
   ],
   target: 'map',
   view: new View({
     center: [0, 0],
     projection: sphereMollweideProjection,
-    zoom: 1
-  })
+    zoom: 1,
+  }),
 });