Merge branch '5.1' into 5.x

* 5.1:
  [Contracts] add branch-aliases for dev-main
  [Cache] Make Redis initializers static
  [Messenger] Fixed typos in Connection
  [CI] Fixed build on AppVeyor
  Fix tests typo
  [Lock] Reset Key lifetime time before we acquire it
  [CI] Silence errors when remove file/dir on test tearDown()
  Fix tests
  Remove content-type check on toArray methods

Author: nicolas-grekas

Tests/Command/LintCommandTest.php

@@ -142,7 +142,7 @@ protected function tearDown(): void
     {
         foreach ($this->files as $file) {
             if (file_exists($file)) {
-                unlink($file);
+                @unlink($file);
             }
         }
     }