Issue #3304503 by jsacksick: Address test failures and fix deprecation warnings due to the events.

composer.json

@@ -5,7 +5,7 @@
     "homepage": "https://www.drupal.org/project/commerce_pricelist",
     "license": "GPL-2.0-or-later",
     "require": {
-        "drupal/commerce": "^2.16 || ^3"
+        "drupal/commerce": "^2.25 || ^3"
     },
     "minimum-stability": "dev"
 }

src/Event/PriceListEvent.php

@@ -2,15 +2,15 @@
 
 namespace Drupal\commerce_pricelist\Event;
 
+use Drupal\commerce\EventBase;
 use Drupal\commerce_pricelist\Entity\PriceListInterface;
-use Symfony\Component\EventDispatcher\Event;
 
 /**
  * Defines the price list event.
  *
  * @see \Drupal\commerce_pricelist\Event\PriceListEvents
  */
-class PriceListEvent extends Event {
+class PriceListEvent extends EventBase {
 
   /**
    * The price list.

src/Event/PriceListItemEvent.php

@@ -2,15 +2,15 @@
 
 namespace Drupal\commerce_pricelist\Event;
 
+use Drupal\commerce\EventBase;
 use Drupal\commerce_pricelist\Entity\PriceListItemInterface;
-use Symfony\Component\EventDispatcher\Event;
 
 /**
  * Defines the price list item event.
  *
  * @see \Drupal\commerce_pricelist\Event\PriceListEvents
  */
-class PriceListItemEvent extends Event {
+class PriceListItemEvent extends EventBase {
 
   /**
    * The price list item.

tests/src/Functional/PriceListItemTest.php

@@ -471,11 +471,11 @@ class PriceListItemTest extends CommerceBrowserTestBase {
       'commerce_product' => $this->firstVariation->getProduct()->id(),
     ])->toString();
     $this->assertSession()->linkByHrefExists($first_variation_prices_uri);
-    $this->clickLink('Edit');
+    $this->drupalGet($this->firstVariation->toUrl('edit-form'));
     $this->assertSession()->linkExists('Prices');
     $this->assertSession()->linkByHrefExists($first_variation_prices_uri);
     $this->clickLink('Prices');
-    $this->assertText('No prices yet.');
+    $this->assertSession()->responseContains('No prices yet.');
     $this->createEntity('commerce_pricelist_item', [
       'type' => 'commerce_product_variation',
       'price_list_id' => $this->priceList->id(),