Add microsoft timezone map (#23)

Co-authored-by: Ren Xie Liu <[email protected]>

Author: liurxliu

lib/timezonedata/extrazones.php

@@ -193,4 +193,5 @@
     'UTC-11' => 'Pacific/Niue',
     'UTC+12' => 'Pacific/Auckland',
     'US Eastern Standard Time' => 'America/New_York',
+    'tzone://Microsoft/Utc' => 'UTC',
 ];

tests/VObject/TimeZoneUtilTest.php

@@ -354,4 +354,11 @@ public function testPrefixedOffsetExchangeIdentifier()
         $ex = new \DateTimeZone('America/New_York');
         $this->assertEquals($ex->getName(), $tz->getName());
     }
+
+    public function testMicrosoftMap()
+    {
+        $tz = TimeZoneUtil::getTimeZone('tzone://Microsoft/Utc', null, true);
+        $ex = new \DateTimeZone('UTC');
+        $this->assertEquals($ex->getName(), $tz->getName());
+    }
 }