replace outdated browser-env with jsdom

package.json

@@ -35,7 +35,6 @@
     "@wordpress/eslint-plugin": "22.10.0",
     "ava": "6.3.0",
     "babel-loader": "10.0.0",
-    "browser-env": "3.3.0",
     "c8": "10.1.3",
     "copy-webpack-plugin": "13.0.0",
     "eslint": "8.57.1",
@@ -46,6 +45,7 @@
     "gulp": "5.0.0",
     "gulp-replace": "1.1.4",
     "husky": "9.1.7",
+    "jsdom": "26.1.0",
     "lint-staged": "15.5.2",
     "prettier": "3.5.3",
     "rimraf": "5.0.10",

source/front/events-displayer-test.js

@@ -1,5 +1,5 @@
 import test from 'ava'
-import browserEnv from 'browser-env'
+import { JSDOM } from 'jsdom'
 
 import {
   displayEvents,
@@ -9,7 +9,9 @@ import {
 } from './events-displayer.js'
 
 test.before(() => {
-  browserEnv()
+  const dom = new JSDOM()
+  global.document = dom.window.document
+  global.window = dom.window
   window.MOBILIZON_CONNECTOR = {
     locale: 'en-GB',
     timeZone: 'utc',

source/front/html-creator-test.js

@@ -1,10 +1,11 @@
 import test from 'ava'
-import browserEnv from 'browser-env'
+import { JSDOM } from 'jsdom'
 
 import { createAnchorElement } from './html-creator.js'
 
 test.beforeEach(() => {
-  browserEnv()
+  const dom = new JSDOM()
+  global.document = dom.window.document
 })
 
 test('#createAnchorElement usual parameters', (t) => {