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/topojson.js

@@ -1,26 +1,29 @@
 import Map from '../src/ol/Map.js';
-import View from '../src/ol/View.js';
-import TopoJSON from '../src/ol/format/TopoJSON.js';
-import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
 import TileJSON from '../src/ol/source/TileJSON.js';
+import TopoJSON from '../src/ol/format/TopoJSON.js';
 import VectorSource from '../src/ol/source/Vector.js';
+import View from '../src/ol/View.js';
 import {Fill, Stroke, Style} from '../src/ol/style.js';
+import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
 
-const key = 'pk.eyJ1IjoidHNjaGF1YiIsImEiOiJjaW5zYW5lNHkxMTNmdWttM3JyOHZtMmNtIn0.CDIBD8H-G2Gf-cPkIuWtRg';
+const key =
+  'pk.eyJ1IjoidHNjaGF1YiIsImEiOiJjaW5zYW5lNHkxMTNmdWttM3JyOHZtMmNtIn0.CDIBD8H-G2Gf-cPkIuWtRg';
 const raster = new TileLayer({
   source: new TileJSON({
-    url: 'https://api.tiles.mapbox.com/v4/mapbox.world-dark.json?secure&access_token=' + key
-  })
+    url:
+      'https://api.tiles.mapbox.com/v4/mapbox.world-dark.json?secure&access_token=' +
+      key,
+  }),
 });
 
 const style = new Style({
   fill: new Fill({
-    color: 'rgba(255, 255, 255, 0.6)'
+    color: 'rgba(255, 255, 255, 0.6)',
   }),
   stroke: new Stroke({
     color: '#319FD3',
-    width: 1
-  })
+    width: 1,
+  }),
 });
 
 const vector = new VectorLayer({
@@ -29,11 +32,11 @@ const vector = new VectorLayer({
     format: new TopoJSON({
       // don't want to render the full world polygon (stored as 'land' layer),
       // which repeats all countries
-      layers: ['countries']
+      layers: ['countries'],
     }),
-    overlaps: false
+    overlaps: false,
   }),
-  style: style
+  style: style,
 });
 
 const map = new Map({
@@ -41,6 +44,6 @@ const map = new Map({
   target: 'map',
   view: new View({
     center: [0, 0],
-    zoom: 1
-  })
+    zoom: 1,
+  }),
 });