Bump docker-pycreds dependency

Signed-off-by: Joffrey F <joffrey@docker.com>

requirements.txt

@@ -3,7 +3,7 @@ asn1crypto==0.22.0
 backports.ssl-match-hostname==3.5.0.1
 cffi==1.10.0
 cryptography==1.9
-docker-pycreds==0.2.2
+docker-pycreds==0.2.3
 enum34==1.1.6
 idna==2.5
 ipaddress==1.0.18

setup.py

@@ -27,7 +27,7 @@ requirements = [
     'requests >= 2.14.2, != 2.18.0',
     'six >= 1.4.0',
     'websocket-client >= 0.32.0',
-    'docker-pycreds >= 0.2.2'
+    'docker-pycreds >= 0.2.3'
 ]
 
 extras_require = {