Add click-spinner stub (#4905)

third_party/2and3/click_spinner/__init__.pyi

@@ -0,0 +1,39 @@
+import threading
+from types import TracebackType
+from typing import Iterator, Optional, Type
+from typing_extensions import Literal, Protocol
+
+__version__: str
+
+class _Stream(Protocol):
+    def isatty(self) -> bool: ...
+    def flush(self) -> None: ...
+    def write(self, s: str) -> int: ...
+
+class Spinner(object):
+    spinner_cycle: Iterator[str]
+    disable: bool
+    beep: bool
+    force: bool
+    stream: _Stream
+    stop_running: Optional[threading.Event]
+    spin_thread: Optional[threading.Thread]
+    def __init__(
+        self,
+        beep: bool,
+        disable: bool,
+        force: bool,
+        stream: _Stream,
+    ) -> None: ...
+    def start(self) -> None: ...
+    def stop(self) -> None: ...
+    def init_spin(self) -> None: ...
+    def __enter__(self) -> Spinner: ...
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> Literal[False]: ...
+
+def spinner(beep: bool, disable: bool, force: bool, stream: _Stream) -> Spinner: ...