Python: Support aiter and anext (new in 3.10)

See
- https://docs.python.org/3/whatsnew/3.10.html#other-language-changes
- https://docs.python.org/3.10/library/functions.html#aiter
- https://docs.python.org/3.10/library/functions.html#anext

python/ql/lib/semmle/python/ApiGraphs.qll

@@ -391,7 +391,7 @@ module API {
       or
       // Python 3 only
       result in [
-          "ascii", "breakpoint", "bytes", "exec",
+          "ascii", "breakpoint", "bytes", "exec", "aiter", "anext",
           // Exceptions
           "BlockingIOError", "BrokenPipeError", "ChildProcessError", "ConnectionAbortedError",
           "ConnectionError", "ConnectionRefusedError", "ConnectionResetError", "FileExistsError",