first add files

lib/Crypto/Hash/keccak.pyi

@@ -0,0 +1,23 @@
+from typing import Union, Any
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+class Keccak_Hash(object):
+    digest_size: int
+    def __init__(self,
+                 data: Buffer,
+                 digest_bytes: int,
+                 update_after_digest: bool) -> None: ...
+    def update(self, data: Buffer) -> Keccak_Hash: ...
+    def digest(self) -> bytes: ...
+    def hexdigest(self) -> str: ...
+    def new(self,
+            data: Buffer = ...,
+            digest_bytes: int = ...,
+            digest_bits: int = ...,
+            update_after_digest: bool = ...) -> Keccak_Hash: ...
+
+def new(data: Buffer = ...,
+        digest_bytes: int = ...,
+        digest_bits: int = ...,
+        update_after_digest: bool = ...) -> Keccak_Hash: ...