reverted:
--- b/addtocal_augment.info.yml
+++ a/addtocal_augment.info.yml
@@ -1,7 +1,8 @@
 name: 'Add to Calendar Date Augmenter'
 type: module
 description: 'Provides a plugin to inject add to calendar links into date displays.'
+core: 8.x
+core_version_requirement: '^8 || ^9'
-core_version_requirement: ^8 || ^9 || ^10
 package: 'Date Augmenter'
 dependencies:
   - 'date_augmenter:date_augmenter'
only in patch2:
unchanged:
--- a/tests/src/Unit/BasicLinkTest.php
+++ b/tests/src/Unit/BasicLinkTest.php
@@ -72,9 +72,7 @@ class BasicLinkTest extends UnitTestCase {
   public function getData() {
 
     // Send a Node mock, because NodeInterface cannot be mocked.
-    $mock_node = $this->getMockBuilder('Drupal\node\Entity\Node')
-      ->disableOriginalConstructor()
-      ->getMock();
+    $mock_node = $this->createMock('Drupal\node\Entity\Node');
     $mock_node->expects($this->any())
       ->method('uuid')
       ->willReturn('uuid12345');