Reduce margin for error in mtime checks

src/Packagist/WebBundle/Controller/PackageController.php

@@ -130,16 +130,16 @@ class PackageController extends Controller
 
         $actions = [];
         foreach ($dumps as $package => $time) {
-            // we subtract 1s to the time for safety, as filemtime can be a little before the logged time (see https://gist.github.com/Seldaek/a5cf4a5551139bc41fb130fa16406290)
-            $actions[$package] = ['type' => 'update', 'package' => $package, 'time' => floor($time / 10000) - 1];
+            // we subtract .2s from the time for safety, as filemtime can be a little before the logged time (see https://gist.github.com/Seldaek/a5cf4a5551139bc41fb130fa16406290)
+            $actions[$package] = ['type' => 'update', 'package' => $package, 'time' => floor(($time - 2000) / 10000)];
         }
         foreach ($deletes as $package => $time) {
             // if a package is dumped then deleted then dumped again because it gets re-added, we want to keep the update action
             // but if it is deleted and marked as dumped within 10 seconds of the deletion, it probably was a race condition between
             // dumped job and deletion, so let's replace it by a delete job anyway
             $newestUpdate = max($actions[$package]['time'] ?? 0, $actions[$package.'~dev']['time'] ?? 0);
-            if ($newestUpdate < $time + (10 * 10000)) {
-                $actions[$package] = ['type' => 'delete', 'package' => $package, 'time' => floor($time / 10000) - 1];
+            if ($newestUpdate < $time + 10) {
+                $actions[$package] = ['type' => 'delete', 'package' => $package, 'time' => floor(($time - 2000) / 10000)];
                 unset($actions[$package.'~dev']);
             }
         }