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.

config/jsdoc/info/define-plugin.js

@@ -5,31 +5,27 @@
  * insensitive, with or without ticks).
  */
 
-
 const DEFAULT_VALUE = /default\s+is\s+`?(true|false)`?/i;
 
-
 /**
  * Hook to define new tags.
  * @param {Object} dictionary The tag dictionary.
  */
-exports.defineTags = function(dictionary) {
-
+exports.defineTags = function (dictionary) {
   dictionary.defineTag('define', {
     canHaveType: true,
     mustHaveValue: true,
-    onTagged: function(doclet, tag) {
+    onTagged: function (doclet, tag) {
       const types = tag.value.type.names;
       if (types.length === 1 && types[0] === 'boolean') {
         const match = tag.value.description.match(DEFAULT_VALUE);
         if (match) {
           doclet.define = {
-            default: match[1] === 'true'
+            default: match[1] === 'true',
           };
           doclet.description = tag.value.description;
         }
       }
-    }
+    },
   });
-
 };