Handle OverflowError on parsing timestamps as BadTimeSignature

on 32bit platforms the test TestTimestampSigner::test_malformed_future_timestamp
causes an OverflowError. Catch this and raise it as BadTimeSignature

Signed-off-by: Dirk Müller <dirk@dmllr.de>

src/itsdangerous/timed.py

@@ -126,7 +126,7 @@ def unsign(
             if ts_int is not None:
                 try:
                     ts_dt = self.timestamp_to_datetime(ts_int)
-                except (ValueError, OSError) as exc:
+                except (OverflowError, ValueError, OSError) as exc:
                     # Windows raises OSError
                     raise BadTimeSignature(
                         "Malformed timestamp", payload=value