Merge pull request #7735 from sclausen/master

added guess(): MomentZone

moment-timezone/moment-timezone-tests.ts

@@ -77,3 +77,5 @@ moment.tz.load({
 moment.tz.names();
 
 moment.tz.setDefault('America/Los_Angeles');
+
+moment.tz.guess();

moment-timezone/moment-timezone.d.ts

@@ -68,6 +68,7 @@ interface MomentTimezone {
     }): void;
 
     names(): string[];
+    guess(): MomentZone;
 
     setDefault(timezone: string): void;
 }