Merge pull request #7570 from docker/dependabot/pip/idna-2.10

Bump idna from 2.8 to 2.10

requirements.txt

@@ -10,7 +10,7 @@ dockerpty==0.4.1
 docopt==0.6.2
 enum34==1.1.6; python_version < '3.4'
 functools32==3.2.3.post2; python_version < '3.2'
-idna==2.8
+idna==2.10
 ipaddress==1.0.23
 jsonschema==3.2.0
 paramiko==2.7.1