Verify in test that latin variant is not picked for sr locale

Author: kylekatarnls

tests/Carbon/LocalizationTest.php

@@ -79,6 +79,7 @@ public function testSetLocaleToAutoFromSupportedLocale(string $language, array $
         }
 
         $this->assertStringStartsWith($language, $locale);
+        $this->assertStringNotContainsString($language, '_Latn');
         $this->assertSame($twoSecondsAgo, $diff);
     }
 

tests/CarbonImmutable/LocalizationTest.php

@@ -83,6 +83,7 @@ public function testSetLocaleToAutoFromSupportedLocale(string $language, array $
         }
 
         $this->assertStringStartsWith($language, $locale);
+        $this->assertStringNotContainsString($language, '_Latn');
         $this->assertSame($twoSecondsAgo, $diff);
     }