Fixed release controller to properly set release date under Windows [skip ci]

build/controllers/ReleaseController.php

@@ -822,7 +822,7 @@ class ReleaseController extends Controller
         $v = str_replace('\\-', '[\\- ]', preg_quote($version, '/'));
         $headline = $version . ' ' . date('F d, Y');
         $this->sed(
-            '/' . $v . ' under development\n(-+?)\n/',
+            '/' . $v . ' under development\R(-+?)\R/',
             $headline . "\n" . str_repeat('-', \strlen($headline)) . "\n",
             $this->getChangelogs($what)
         );
@@ -830,7 +830,7 @@ class ReleaseController extends Controller
 
     protected function openChangelogs($what, $version)
     {
-        $headline = "\n$version under development\n";
+        $headline = "\n$version under development\R";
         $headline .= str_repeat('-', \strlen($headline) - 2) . "\n\n- no changes in this release.\n";
         foreach ($this->getChangelogs($what) as $file) {
             $lines = explode("\n", file_get_contents($file));
@@ -987,7 +987,7 @@ class ReleaseController extends Controller
     protected function updateYiiVersion($frameworkPath, $version)
     {
         $this->sed(
-            '/function getVersion\(\)\n    \{\n        return \'(.+?)\';/',
+            '/function getVersion\(\)\R    \{\R        return \'(.+?)\';/',
             "function getVersion()\n    {\n        return '$version';",
             $frameworkPath . '/BaseYii.php');
     }