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/scaleline-indiana-east.js

@@ -1,13 +1,15 @@
 import Map from '../src/ol/Map.js';
-import View from '../src/ol/View.js';
-import {ScaleLine} from '../src/ol/control.js';
+import OSM from '../src/ol/source/OSM.js';
 import TileLayer from '../src/ol/layer/Tile.js';
+import View from '../src/ol/View.js';
+import proj4 from 'proj4';
+import {ScaleLine} from '../src/ol/control.js';
 import {fromLonLat, transformExtent} from '../src/ol/proj.js';
 import {register} from '../src/ol/proj/proj4.js';
-import OSM from '../src/ol/source/OSM.js';
-import proj4 from 'proj4';
 
-proj4.defs('Indiana-East', 'PROJCS["IN83-EF",GEOGCS["LL83",DATUM["NAD83",' +
+proj4.defs(
+  'Indiana-East',
+  'PROJCS["IN83-EF",GEOGCS["LL83",DATUM["NAD83",' +
     'SPHEROID["GRS1980",6378137.000,298.25722210]],PRIMEM["Greenwich",0],' +
     'UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],' +
     'PARAMETER["false_easting",328083.333],' +
@@ -15,24 +17,28 @@ proj4.defs('Indiana-East', 'PROJCS["IN83-EF",GEOGCS["LL83",DATUM["NAD83",' +
     'PARAMETER["scale_factor",0.999966666667],' +
     'PARAMETER["central_meridian",-85.66666666666670],' +
     'PARAMETER["latitude_of_origin",37.50000000000000],' +
-    'UNIT["Foot_US",0.30480060960122]]');
+    'UNIT["Foot_US",0.30480060960122]]'
+);
 register(proj4);
 
 const map = new Map({
   layers: [
     new TileLayer({
-      source: new OSM()
-    })
+      source: new OSM(),
+    }),
   ],
   target: 'map',
   view: new View({
     projection: 'Indiana-East',
     center: fromLonLat([-85.685, 39.891], 'Indiana-East'),
     zoom: 7,
-    extent: transformExtent([-172.54, 23.81, -47.74, 86.46],
-      'EPSG:4326', 'Indiana-East'),
-    minZoom: 6
-  })
+    extent: transformExtent(
+      [-172.54, 23.81, -47.74, 86.46],
+      'EPSG:4326',
+      'Indiana-East'
+    ),
+    minZoom: 6,
+  }),
 });
 
 map.addControl(new ScaleLine({units: 'us'}));