Add CI action to mark/close stale issues and PR (#573)
Add CI action to mark/close stale issues and PR (#573)

Co-authored-by: Ionésio Junior <7af06cdc850a64efc3c3e452b8652a0e6482e8b8@gmail.com>
Co-authored-by: Andrew Trask <ac6d3829c73b6b303e60ec0bd2eb999f388c87a8@gmail.com>
OpenMined/PySyft,OpenMined/PySyft,OpenMined/PySyft,OpenMined/PySyft