Bug 1534702 - Release marionette_driver 3.0.0 and marionette_harness 5.0.0. r=webdriver-reviewers,ato

This will be the last public release of both packages on PyPI.
See the announcement from January this year:

https://groups.google.com/forum/#!topic/mozilla.tools.marionette/s6_03Qt2ubc

If both packages are still required by tools, they would have to
be self-built by a checkout of mozilla-central.

Differential Revision: https://phabricator.services.mozilla.com/D48674

--HG--
extra : moz-landing-system : lando

testing/marionette/client/marionette_driver/__init__.py

@@ -4,7 +4,7 @@
 
 from __future__ import absolute_import
 
-__version__ = '2.8.0'
+__version__ = '3.0.0'
 
 from marionette_driver import (
     addons,

testing/marionette/harness/marionette_harness/__init__.py

@@ -4,7 +4,7 @@
 
 from __future__ import absolute_import
 
-__version__ = '4.6.0'
+__version__ = '5.0.0'
 
 from .marionette_test import (
     CommonTestCase,

testing/marionette/harness/requirements.txt

@@ -1,6 +1,6 @@
 browsermob-proxy >= 0.8.0
 manifestparser >= 1.1
-marionette-driver >= 2.8.0
+marionette-driver >= 3.0.0
 mozcrash >= 1.1.0
 mozdevice >= 3.0.1
 mozinfo >= 1.0.0