st_mtime is not converted to int in async

[GeekDuanLian]

pure-python-adb/ppadb/sync_async/__init__.py

Line 23 in b136202

timestamp = os.stat(src).st_mtime

Will crash struct.error: required argument is not an integer in async push, but it works fine in sync.
Are there any other modifications that are not synchronized with sync?

[GeekDuanLian]

I briefly browsed the sync, and the others seem to be no different, just this one should be changed.