sig/resolver/system.rbs in httpx-0.16.1 vs sig/resolver/system.rbs in httpx-0.17.0

@@ -1,10 +1,10 @@
 module HTTPX
   module Resolver
     class System
       include ResolverMixin
 
-      RESOLV_ERRORS: Array[StandardError] # ResolvError
+      RESOLV_ERRORS: Array[singleton(StandardError)] # ResolvError
 
       def closed?: () -> true
 
       def empty?: () -> true
 
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