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.

rendering/cases/render-context/main.js

@@ -1,77 +1,126 @@
+import CircleStyle from '../../../src/ol/style/Circle.js';
+import Fill from '../../../src/ol/style/Fill.js';
 import LineString from '../../../src/ol/geom/LineString.js';
 import Point from '../../../src/ol/geom/Point.js';
 import Polygon from '../../../src/ol/geom/Polygon.js';
-import {toContext} from '../../../src/ol/render.js';
-import CircleStyle from '../../../src/ol/style/Circle.js';
-import Fill from '../../../src/ol/style/Fill.js';
 import Stroke from '../../../src/ol/style/Stroke.js';
 import Style from '../../../src/ol/style/Style.js';
+import {toContext} from '../../../src/ol/render.js';
 
 const canvas = document.getElementById('canvas');
 const vectorContext = toContext(canvas.getContext('2d'), {
   pixelRatio: 1,
-  size: [200, 200]
+  size: [200, 200],
 });
 
-vectorContext.setStyle(new Style({
-  image: new CircleStyle({
-    fill: new Fill({
-      color: 'green'
+vectorContext.setStyle(
+  new Style({
+    image: new CircleStyle({
+      fill: new Fill({
+        color: 'green',
+      }),
+      radius: 10,
     }),
-    radius: 10
   })
-}));
+);
 vectorContext.drawGeometry(new Point([100, 100]));
 
-vectorContext.setStyle(new Style({
-  stroke: new Stroke({
-    lineCap: 'butt',
-    color: 'red',
-    width: 14
+vectorContext.setStyle(
+  new Style({
+    stroke: new Stroke({
+      lineCap: 'butt',
+      color: 'red',
+      width: 14,
+    }),
   })
-}));
-vectorContext.drawGeometry(new LineString([
-  [10, 60], [30, 40], [50, 60], [70, 40], [90, 60]
-]));
+);
+vectorContext.drawGeometry(
+  new LineString([
+    [10, 60],
+    [30, 40],
+    [50, 60],
+    [70, 40],
+    [90, 60],
+  ])
+);
 
-vectorContext.setStyle(new Style({
-  stroke: new Stroke({
-    lineJoin: 'bevel',
-    lineCap: 'butt',
-    color: '#111',
-    width: 14
+vectorContext.setStyle(
+  new Style({
+    stroke: new Stroke({
+      lineJoin: 'bevel',
+      lineCap: 'butt',
+      color: '#111',
+      width: 14,
+    }),
   })
-}));
-vectorContext.drawGeometry(new LineString([
-  [10, 140], [30, 120], [50, 140], [70, 120], [90, 140]
-]));
+);
+vectorContext.drawGeometry(
+  new LineString([
+    [10, 140],
+    [30, 120],
+    [50, 140],
+    [70, 120],
+    [90, 140],
+  ])
+);
 
-
-vectorContext.setStyle(new Style({
-  stroke: new Stroke({
-    color: 'blue',
-    width: 6
-  }),
-  fill: new Fill({
-    color: 'rgba(0,0,255,0.5)'
+vectorContext.setStyle(
+  new Style({
+    stroke: new Stroke({
+      color: 'blue',
+      width: 6,
+    }),
+    fill: new Fill({
+      color: 'rgba(0,0,255,0.5)',
+    }),
   })
-}));
+);
 
-vectorContext.drawGeometry(new Polygon([
-  [[125, 25], [175, 25], [175, 75], [125, 75], [125, 25]],
-  [[140, 40], [140, 60], [160, 60], [160, 40], [140, 40]]
-]));
+vectorContext.drawGeometry(
+  new Polygon([
+    [
+      [125, 25],
+      [175, 25],
+      [175, 75],
+      [125, 75],
+      [125, 25],
+    ],
+    [
+      [140, 40],
+      [140, 60],
+      [160, 60],
+      [160, 40],
+      [140, 40],
+    ],
+  ])
+);
 
-vectorContext.setStyle(new Style({
-  stroke: new Stroke({
-    lineDash: [10, 5],
-    lineDashOffset: 5
+vectorContext.setStyle(
+  new Style({
+    stroke: new Stroke({
+      lineDash: [10, 5],
+      lineDashOffset: 5,
+    }),
   })
-}));
+);
 
-vectorContext.drawGeometry(new Polygon([
-  [[125, 125], [175, 125], [175, 175], [125, 175], [125, 125]],
-  [[140, 140], [140, 160], [160, 160], [160, 140], [140, 140]]
-]));
+vectorContext.drawGeometry(
+  new Polygon([
+    [
+      [125, 125],
+      [175, 125],
+      [175, 175],
+      [125, 175],
+      [125, 125],
+    ],
+    [
+      [140, 140],
+      [140, 160],
+      [160, 160],
+      [160, 140],
+      [140, 140],
+    ],
+  ])
+);
 
 render();