expand cloudpickle range (#1836)

* expand cloudpickle range

* 0.17.1 release note

README.rst

@@ -160,6 +160,9 @@ We are using `pytest <http://doc.pytest.org>`_ for tests. You can run them via:
 
 What's new
 ==========
+- 2020-03-05 (v 0.17.1)
+   + update cloudpickle dependency to be >=1.2.0,<1.4.0
+
 - 2020-02-21 (v 0.17.0)
    - Drop python 2 support
    + Add python 3.8 build

gym/version.py

@@ -1 +1 @@
-VERSION = '0.17.0'
+VERSION = '0.17.1'

setup.py

@@ -28,7 +28,7 @@ setup(name='gym',
                 if package.startswith('gym')],
       zip_safe=False,
       install_requires=[
-          'scipy', 'numpy>=1.10.4', 'six', 'pyglet>=1.4.0,<=1.5.0', 'cloudpickle~=1.3.0',
+          'scipy', 'numpy>=1.10.4', 'six', 'pyglet>=1.4.0,<=1.5.0', 'cloudpickle>=1.2.0,<1.4.0',
           'enum34~=1.1.6;python_version<"3.4"',
       ],
       extras_require=extras,