add type stubs

umsgpack.pyi

@@ -0,0 +1,41 @@
+from typing import Any
+
+__version__: str
+
+version: tuple[int, int, int]
+
+def pack(obj, fp, **options) -> None: ...
+def packb(obj, **options) -> bytes: ...
+def dump(obj, fp, **options) -> None: ...
+def dumps(obj, **options) -> bytes: ...
+
+def unpackb(s: bytes | bytearray, **options) -> Any: ...
+def unpack(fp, **options) -> Any: ...
+def loads(s: bytes | bytearray, **options) -> Any: ...
+def load(fp, **options) -> Any: ...
+
+class Ext:
+    type: int
+    data: bytes
+    def __init__(self, type: int, data: bytes) -> None: ...
+    def __eq__(self, other) -> bool: ...
+    def __ne__(self, other) -> bool: ...
+    def __hash__(self) -> int: ...
+
+class InvalidString(bytes): ...
+
+def ext_serializable(ext_type: int): ...
+
+class PackException(Exception): ...
+class UnpackException(Exception): ...
+class UnsupportedTypeException(PackException): ...
+class InsufficientDataException(UnpackException): ...
+class InvalidStringException(UnpackException): ...
+class UnsupportedTimestampException(UnpackException): ...
+class ReservedCodeException(UnpackException): ...
+class UnhashableKeyException(UnpackException): ...
+class DuplicateKeyException(UnpackException): ...
+KeyNotPrimitiveException = UnhashableKeyException
+KeyDuplicateException = DuplicateKeyException
+
+compatibility: bool