ci: add WP 5.8 to automated test roster

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
       matrix:
         include:
           - php: '7.4'
-            wordpress: '5.7'
+            wordpress: '5.8'
           - php: '5.6'
             wordpress: '4.7'
     steps:

README.md

@@ -9,7 +9,7 @@
 * Contributors:      Stefan Kalscheuer
 * Tags:              liveticker, feed, rss
 * Requires at least: 4.7
-* Tested up to:      5.7
+* Tested up to:      5.8
 * Requires PHP:      5.6
 * Stable tag:        1.1.1
 * License:           GPLv2 or later

composer.json

@@ -24,12 +24,11 @@
     "phpunit/phpunit": "^5|^6|^7",
     "dealerdirect/phpcodesniffer-composer-installer": "^0.7",
     "slowprog/composer-copy-file": "~0.3",
-    "squizlabs/php_codesniffer": "^3.5",
+    "squizlabs/php_codesniffer": "^3.6",
     "phpcompatibility/phpcompatibility-wp": "^2.1",
     "wp-coding-standards/wpcs": "^2.3",
-    "patchwork/jsqueeze": "^2.0",
+    "matthiasmullie/minify": "^1.3",
-    "natxet/cssmin": "^3.0",
+    "yoast/phpunit-polyfills": "^1.0"
-    "matthiasmullie/minify": "^1.3"
   },
   "scripts": {
     "post-install-cmd": [

tests/bootstrap.php

@@ -5,6 +5,8 @@
  * @package SCLiveticker
  */
 
+require_once __DIR__ . '/../vendor/yoast/phpunit-polyfills/phpunitpolyfills-autoload.php';
+
 $_tests_dir = getenv( 'WP_TESTS_DIR' );
 
 if ( ! $_tests_dir ) {