add typing module

(just stubs, but should implement most of the stuff from PEP 484
and https://docs.python.org/3/library/typing.html)

src/lib/typing.py

@@ -0,0 +1,63 @@
+__names_get = [
+    'AbstractSet',
+    'AsyncIterable',
+    'AsyncIterator',
+    'Awaitable',
+    'ByteString',
+    'Callable',
+    'Container',
+    'DefaultDict',
+    'Dict',
+    'Generator',
+    'Generic',
+    'ItemsView',
+    'Iterable',
+    'Iterator',
+    'KeysView',
+    'List',
+    'Mapping',
+    'MappingView',
+    'MutableMapping',
+    'MutableSequence',
+    'MutableSet',
+    'Optional',
+    'Reversible',
+    'Sequence',
+    'Set',
+    'Tuple',
+    'Type',
+    'Union',
+    'ValuesView',
+]
+
+__names_obj = [
+    'Any',
+    'AnyStr',
+    'Hashable',
+    'Sized',
+    'SupportsAbs',
+    'SupportsFloat',
+    'SupportsInt',
+    'SupportsRound',
+    'Text',
+]
+
+class __dummy:
+    def __getitem__(self, *args):
+        return object
+
+__t = __dummy()
+
+for __n in __names_get:
+    globals()[__n] = __t
+
+for __n in __names_obj:
+    globals()[__n] = object
+
+def TypeVar(*args):
+    return object
+
+def NewType(*args):
+    return object
+
+TYPE_CHECKING = False