change version range for requests dependency (#533)

* Define version range of requests module to work with docker-compose and docker

* Update change log

* Fix change log

Author: yangaws

CHANGELOG.rst

@@ -5,6 +5,7 @@ CHANGELOG
 1.16.2.dev
 ==========
 
+* bug-fix: add version bound for requests module to avoid version conflicts between docker-compose and docker-py
 * bug-fix: Remove unnecessary dependency tensorflow
 * doc-fix: Change ``distribution`` to ``distributions``
 * bug-fix: Increase docker-compose http timeout and health check timeout to 120.

setup.py

@@ -35,7 +35,7 @@ def read(fname):
 # Declare minimal set for installation
 required_packages = ['boto3>=1.9.55', 'numpy>=1.9.0', 'protobuf>=3.1', 'scipy>=0.19.0',
                      'urllib3>=1.21', 'PyYAML>=3.2, <4', 'protobuf3-to-dict>=0.1.5',
-                     'docker-compose>=1.23.0']
+                     'docker-compose>=1.23.0', 'requests>=2.14.2, !=2.18.0, <2.21']
 
 # enum is introduced in Python 3.4. Installing enum back port
 if sys.version_info < (3, 4):