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/ConfigCacheTest.php

@@ -30,7 +30,7 @@ protected function tearDown(): void
 
         foreach ($files as $file) {
             if (file_exists($file)) {
-                unlink($file);
+                @unlink($file);
             }
         }
     }

Tests/Resource/FileExistenceResourceTest.php

@@ -30,7 +30,7 @@ protected function setUp(): void
     protected function tearDown(): void
     {
         if (file_exists($this->file)) {
-            unlink($this->file);
+            @unlink($this->file);
         }
     }
 

Tests/Resource/FileResourceTest.php

@@ -30,11 +30,9 @@ protected function setUp(): void
 
     protected function tearDown(): void
     {
-        if (!file_exists($this->file)) {
-            return;
+        if (file_exists($this->file)) {
+            @unlink($this->file);
         }
-
-        unlink($this->file);
     }
 
     public function testGetResource()

Tests/ResourceCheckerConfigCacheTest.php

@@ -31,7 +31,7 @@ protected function tearDown(): void
 
         foreach ($files as $file) {
             if (file_exists($file)) {
-                unlink($file);
+                @unlink($file);
             }
         }
     }