Issue #14428, #14397: Implement the PEP 418

 * Rename time.steady() to time.monotonic()
 * On Windows, time.monotonic() uses GetTickCount/GetTickCount64() instead of
   QueryPerformanceCounter()
 * time.monotonic() uses CLOCK_HIGHRES if available
 * Add time.get_clock_info(), time.perf_counter() and time.process_time()
   functions
diff --git a/Lib/threading.py b/Lib/threading.py
index 8c2cee9..6c34d49 100644
--- a/Lib/threading.py
+++ b/Lib/threading.py
@@ -3,7 +3,11 @@
 import sys as _sys
 import _thread
 
-from time import steady as _time, sleep as _sleep
+from time import sleep as _sleep
+try:
+    from time import monotonic as _time
+except ImportError:
+    from time import time as _time
 from traceback import format_exc as _format_exc
 from _weakrefset import WeakSet