Fix PYRE_MISSING_ANNOTATIONS issue in fbcode/aml/augly/text/augmenters/base64.py

Reviewed By: joecoli

Differential Revision: D92956201

fbshipit-source-id: 14a545c506e9a2afbd42f3bc95645e20e6697531

Author: generatedunixname1401739305002972

augly/text/augmenters/base64.py

@@ -20,7 +20,7 @@ def __init__(
         aug_max: int,
         aug_p: float,
         granularity: Literal["all", "word", "char"],
-    ):
+    ) -> None:
         super().__init__(
             name="Base64",
             aug_min=aug_min,