Add pygost deps

deps/pygost-5.12/pygost/stubs/pygost/gost34112012512.pyi

@@ -0,0 +1,24 @@
+from pygost.iface import PEP247
+
+
+class GOST34112012512(PEP247):
+    block_size = ...  # type: int
+
+    def __init__(self, data: bytes = ...) -> None: ...
+
+    @property
+    def digest_size(self) -> int: ...
+
+    def copy(self) -> "GOST34112012512": ...
+
+    def update(self, data: bytes) -> None: ...
+
+    def digest(self) -> bytes: ...
+
+    def hexdigest(self) -> str: ...
+
+
+def new(data: bytes = ...) -> GOST34112012512: ...
+
+
+def pbkdf2(password: bytes, salt: bytes, iterations: int, dklen: int) -> bytes: ...