Merge branch '5.1' into 5.2

* 5.1:
  Update .php_cs.dist
  Apply "visibility_required" CS rule to constants

Author: nicolas-grekas

Exception/ProcessTimedOutException.php

@@ -20,8 +20,8 @@
  */
 class ProcessTimedOutException extends RuntimeException
 {
-    const TYPE_GENERAL = 1;
-    const TYPE_IDLE = 2;
+    public const TYPE_GENERAL = 1;
+    public const TYPE_IDLE = 2;
 
     private $process;
     private $timeoutType;

Pipes/PipesInterface.php

@@ -20,7 +20,7 @@
  */
 interface PipesInterface
 {
-    const CHUNK_SIZE = 16384;
+    public const CHUNK_SIZE = 16384;
 
     /**
      * Returns an array of descriptors for the use of proc_open.

Process.php

@@ -30,24 +30,24 @@
  */
 class Process implements \IteratorAggregate
 {
-    const ERR = 'err';
-    const OUT = 'out';
+    public const ERR = 'err';
+    public const OUT = 'out';
 
-    const STATUS_READY = 'ready';
-    const STATUS_STARTED = 'started';
-    const STATUS_TERMINATED = 'terminated';
+    public const STATUS_READY = 'ready';
+    public const STATUS_STARTED = 'started';
+    public const STATUS_TERMINATED = 'terminated';
 
-    const STDIN = 0;
-    const STDOUT = 1;
-    const STDERR = 2;
+    public const STDIN = 0;
+    public const STDOUT = 1;
+    public const STDERR = 2;
 
     // Timeout Precision in seconds.
-    const TIMEOUT_PRECISION = 0.2;
+    public const TIMEOUT_PRECISION = 0.2;
 
-    const ITER_NON_BLOCKING = 1; // By default, iterating over outputs is a blocking call, use this flag to make it non-blocking
-    const ITER_KEEP_OUTPUT = 2;  // By default, outputs are cleared while iterating, use this flag to keep them in memory
-    const ITER_SKIP_OUT = 4;     // Use this flag to skip STDOUT while iterating
-    const ITER_SKIP_ERR = 8;     // Use this flag to skip STDERR while iterating
+    public const ITER_NON_BLOCKING = 1; // By default, iterating over outputs is a blocking call, use this flag to make it non-blocking
+    public const ITER_KEEP_OUTPUT = 2;  // By default, outputs are cleared while iterating, use this flag to keep them in memory
+    public const ITER_SKIP_OUT = 4;     // Use this flag to skip STDOUT while iterating
+    public const ITER_SKIP_ERR = 8;     // Use this flag to skip STDERR while iterating
 
     private $callback;
     private $hasCallback = false;