Update types.py

Author: sobolevn

hypothesis-python/src/hypothesis/strategies/_internal/types.py

@@ -98,7 +98,7 @@ def try_issubclass(thing, superclass):
 
 
 def is_a_new_type(thing):
-    if not isinstance(thing, type):
+    if not isinstance(typing.NewType, type):
         # At runtime, `typing.NewType` returns an identity function rather
         # than an actual type, but we can check whether that thing matches.
         return (