fix: phpunit errors and lint remaining files

Author: Aryan-R-Patel

css/ableplayer_transcript.css

@@ -22,4 +22,3 @@
 .able-status-bar {
   height: 2em !important;
 }
-

js/ableplayer_transcript_placement.js

@@ -42,8 +42,8 @@
 
         // Start observing
         observer.observe(document.body, {
-          childList: true,
-          subtree: true
+          childList: TRUE,
+          subtree: TRUE
         });
       })
 

src/Functional/LoadTest.php

@@ -4,14 +4,21 @@
 
 use Drupal\Core\Url;
 use Drupal\Tests\BrowserTestBase;
+use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;
 
 /**
  * Simple test to ensure that main page loads with module enabled.
  *
  * @group ableplayer_extend
  */
+#[RunTestsInSeparateProcesses]
 class LoadTest extends BrowserTestBase {
 
+  /**
+   * {@inheritdoc}
+   */
+  protected $defaultTheme = 'stark';
+
   /**
    * Modules to enable.
    *
@@ -40,7 +47,7 @@ protected function setUp(): void {
    */
   public function testLoad() {
     $this->drupalGet(Url::fromRoute('<front>'));
-    $this->assertSession()->responseContains('200');
+    $this->assertSession()->statusCodeEquals(200);
   }
 
 }