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/icon-color.js

@@ -1,72 +1,76 @@
 import Feature from '../src/ol/Feature.js';
 import Map from '../src/ol/Map.js';
-import View from '../src/ol/View.js';
 import Point from '../src/ol/geom/Point.js';
-import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
-import {fromLonLat} from '../src/ol/proj.js';
 import TileJSON from '../src/ol/source/TileJSON.js';
 import VectorSource from '../src/ol/source/Vector.js';
+import View from '../src/ol/View.js';
 import {Icon, Style} from '../src/ol/style.js';
-
+import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
+import {fromLonLat} from '../src/ol/proj.js';
 
 const rome = new Feature({
-  geometry: new Point(fromLonLat([12.5, 41.9]))
+  geometry: new Point(fromLonLat([12.5, 41.9])),
 });
 
 const london = new Feature({
-  geometry: new Point(fromLonLat([-0.12755, 51.507222]))
+  geometry: new Point(fromLonLat([-0.12755, 51.507222])),
 });
 
 const madrid = new Feature({
-  geometry: new Point(fromLonLat([-3.683333, 40.4]))
+  geometry: new Point(fromLonLat([-3.683333, 40.4])),
 });
 
-rome.setStyle(new Style({
-  image: new Icon({
-    color: '#8959A8',
-    crossOrigin: 'anonymous',
-    imgSize: [20, 20],
-    src: 'data/square.svg'
+rome.setStyle(
+  new Style({
+    image: new Icon({
+      color: '#8959A8',
+      crossOrigin: 'anonymous',
+      imgSize: [20, 20],
+      src: 'data/square.svg',
+    }),
   })
-}));
+);
 
-london.setStyle(new Style({
-  image: new Icon({
-    color: '#4271AE',
-    crossOrigin: 'anonymous',
-    src: 'data/dot.png'
+london.setStyle(
+  new Style({
+    image: new Icon({
+      color: '#4271AE',
+      crossOrigin: 'anonymous',
+      src: 'data/dot.png',
+    }),
   })
-}));
+);
 
-madrid.setStyle(new Style({
-  image: new Icon({
-    color: [113, 140, 0],
-    crossOrigin: 'anonymous',
-    src: 'data/dot.png'
+madrid.setStyle(
+  new Style({
+    image: new Icon({
+      color: [113, 140, 0],
+      crossOrigin: 'anonymous',
+      src: 'data/dot.png',
+    }),
   })
-}));
-
+);
 
 const vectorSource = new VectorSource({
-  features: [rome, london, madrid]
+  features: [rome, london, madrid],
 });
 
 const vectorLayer = new VectorLayer({
-  source: vectorSource
+  source: vectorSource,
 });
 
 const rasterLayer = new TileLayer({
   source: new TileJSON({
     url: 'https://a.tiles.mapbox.com/v3/aj.1x1-degrees.json',
-    crossOrigin: ''
-  })
+    crossOrigin: '',
+  }),
 });
 
 const map = new Map({
   layers: [rasterLayer, vectorLayer],
   target: document.getElementById('map'),
   view: new View({
-    center: fromLonLat([2.896372, 44.60240]),
-    zoom: 3
-  })
+    center: fromLonLat([2.896372, 44.6024]),
+    zoom: 3,
+  }),
 });