Bump public version for PyPI release

Summary: - Lets release this to PyPI with an accurate version

Reviewed By: fried

Differential Revision: D19959187

fbshipit-source-id: a154a10582ddcd6e3adccd6a868e10bdfca37946

Author: cooperlees

later/__init__.py

@@ -18,7 +18,7 @@
 from .task import START_TASK, Watcher, WatcherError, as_task, cancel
 
 
-__version__ = "20.01.0"
+__version__ = "20.2.0"
 __all__ = [
     "BiDirectionalEvent",
     "START_TASK",