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.

src/ol/layer/WebGLPoints.js

@@ -1,11 +1,10 @@
 /**
  * @module ol/layer/WebGLPoints
  */
-import {assign} from '../obj.js';
-import WebGLPointsLayerRenderer from '../renderer/webgl/PointsLayer.js';
-import {parseLiteralStyle} from '../webgl/ShaderBuilder.js';
 import Layer from './Layer.js';
-
+import WebGLPointsLayerRenderer from '../renderer/webgl/PointsLayer.js';
+import {assign} from '../obj.js';
+import {parseLiteralStyle} from '../webgl/ShaderBuilder.js';
 
 /**
  * @typedef {Object} Options
@@ -32,7 +31,6 @@ import Layer from './Layer.js';
  * prevent all hit detection on the layer.
  */
 
-
 /**
  * @classdesc
  * Layer optimized for rendering large point datasets. Takes a `style` property which
@@ -100,12 +98,14 @@ class WebGLPointsLayer extends Layer {
     return new WebGLPointsLayerRenderer(this, {
       vertexShader: this.parseResult_.builder.getSymbolVertexShader(),
       fragmentShader: this.parseResult_.builder.getSymbolFragmentShader(),
-      hitVertexShader: !this.hitDetectionDisabled_ &&
+      hitVertexShader:
+        !this.hitDetectionDisabled_ &&
         this.parseResult_.builder.getSymbolVertexShader(true),
-      hitFragmentShader: !this.hitDetectionDisabled_ &&
+      hitFragmentShader:
+        !this.hitDetectionDisabled_ &&
         this.parseResult_.builder.getSymbolFragmentShader(true),
       uniforms: this.parseResult_.uniforms,
-      attributes: this.parseResult_.attributes
+      attributes: this.parseResult_.attributes,
     });
   }