dataflow: bring back version to setup.py and set it to 0.0.3.

Effectively revert of https://chromium-review.googlesource.com/848742
with a version bump.

This is necessary in order to release new versions.

R=iannucci@chromium.org

Change-Id: Ia5cf7b2f05e4abc16361835bfef1c7d4edfce63d
Reviewed-on: https://chromium-review.googlesource.com/996894
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>
Cr-Mirrored-From: https://chromium.googlesource.com/infra/infra
Cr-Mirrored-Commit: 8630d830e250bcb0a42c1d8850819328b10d3685

setup.py

diff --git a/setup.py b/setup.py
index ea28213..954f207 100644
--- a/setup.py
+++ b/setup.py
@@ -6,6 +6,7 @@
 
 setup(
     name='dataflow',
+    version='0.0.3',
     description='Chrome Infra Dataflow Workflows',
     long_description=('This package includes Chrome Infra workflows as well as '
                       'common modules.'),