fix: "urllib3 (1.26.6) or chardet (3.0.4) doesn't match a supported version"

Patroni has not uses this dependence - patroni/patroni@90a4208#diff-b4ef698db8ca845e5845c4618278f29a

But, if there is already an installed "requests" package of the old version, when using the patronictl, we received the following warning:
urllib3 (1.26.6) or chardet (3.0.4) doesn't match a supported version!

vitabaks#117

Author: vitabaks

files/requirements.txt

@@ -1,7 +1,8 @@
 urllib3>=1.25.9
 boto
 PyYAML
-six >= 1.7
+requests>=2.26.0
+six>=1.7
 python-etcd>=0.4.3,<0.5
 python-consul>=0.7.1
 click>=4.1