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.

test/spec/ol/net.test.js

@@ -1,9 +1,8 @@
 import {getUid} from '../../../src/ol/util.js';
 import {jsonp as requestJSONP} from '../../../src/ol/net.js';
 
-describe('ol.net', function() {
-
-  describe('jsonp()', function() {
+describe('ol.net', function () {
+  describe('jsonp()', function () {
     const head = document.getElementsByTagName('head')[0];
     const origAppendChild = head.appendChild;
     const origCreateElement = document.createElement;
@@ -12,7 +11,7 @@ describe('ol.net', function() {
 
     function createCallback(url, done) {
       removeChild = sinon.spy();
-      const callback = function(data) {
+      const callback = function (data) {
         expect(data).to.be(url + key);
         expect(removeChild.called).to.be(true);
         done();
@@ -21,49 +20,49 @@ describe('ol.net', function() {
       return callback;
     }
 
-    beforeEach(function() {
+    beforeEach(function () {
       const element = {};
-      document.createElement = function(arg) {
+      document.createElement = function (arg) {
         if (arg == 'script') {
           return element;
         } else {
           return origCreateElement.apply(document, arguments);
         }
       };
-      head.appendChild = function(el) {
+      head.appendChild = function (el) {
         if (el === element) {
           element.parentNode = {
-            removeChild: removeChild
+            removeChild: removeChild,
           };
-          origSetTimeout(function() {
+          origSetTimeout(function () {
             window[key](element.src);
           }, 0);
         } else {
           origAppendChild.apply(head, arguments);
         }
       };
-      setTimeout = function(fn, time) {
+      setTimeout = function (fn, time) {
         origSetTimeout(fn, 100);
       };
     });
 
-    afterEach(function() {
+    afterEach(function () {
       document.createElement = origCreateElement;
       head.appendChild = origAppendChild;
       setTimeout = origSetTimeout;
     });
 
-    it('appends callback param to url, cleans up after call', function(done) {
+    it('appends callback param to url, cleans up after call', function (done) {
       requestJSONP('foo', createCallback('foo?callback=', done));
     });
-    it('appends correct callback param to a url with query', function(done) {
+    it('appends correct callback param to a url with query', function (done) {
       const callback = createCallback('http://foo/bar?baz&callback=', done);
       requestJSONP('http://foo/bar?baz', callback);
     });
-    it('calls errback when jsonp is not executed, cleans up', function(done) {
-      head.appendChild = function(element) {
+    it('calls errback when jsonp is not executed, cleans up', function (done) {
+      head.appendChild = function (element) {
         element.parentNode = {
-          removeChild: removeChild
+          removeChild: removeChild,
         };
       };
       function callback() {
@@ -76,11 +75,9 @@ describe('ol.net', function() {
       }
       requestJSONP('foo', callback, errback);
     });
-    it('accepts a custom callback param', function(done) {
+    it('accepts a custom callback param', function (done) {
       const callback = createCallback('foo?mycallback=', done);
       requestJSONP('foo', callback, undefined, 'mycallback');
     });
-
   });
-
 });