deps: upgrade & remove unnecessary dependencies (docker#3014)

The `requirements.txt` and `setup.py` had a lot of extra transitive
dependencies to try and address various SSL shortcomings from the
Python ecosystem.

Thankfully, between modern Python versions (3.6+) and corresponding
`requests` versions (2.26+), this is all unnecessary now!

As a result, a bunch of transitive dependencies have been removed
from `requirements.txt`, the minimum version of `requests` increased,
and the `tls` extra made into a no-op.

Signed-off-by: Milas Bowman <milas.bowman@docker.com>

Author: milas

Diff for: README.md

@@ -10,9 +10,8 @@ The latest stable version [is available on PyPI](https://pypi.python.org/pypi/do
 
     pip install docker
 
-If you are intending to connect to a docker host via TLS, add `docker[tls]` to your requirements instead, or install with pip:
-
-    pip install docker[tls]
+> Older versions (< 6.0) required installing `docker[tls]` for SSL/TLS support.
+> This is no longer necessary and is a no-op, but is supported for backwards compatibility.
 
 ## Usage
 

Diff for: appveyor.yml

@@ -1,16 +1,6 @@
-appdirs==1.4.3
-asn1crypto==0.22.0
-cffi==1.14.4
-cryptography==3.4.7
-enum34==1.1.6
-idna==2.5
-ipaddress==1.0.18
 packaging==21.3
-paramiko==2.10.1
-pycparser==2.17
-pyOpenSSL==18.0.0
-pyparsing==2.2.0
+paramiko==2.11.0
 pywin32==304; sys_platform == 'win32'
-requests==2.26.0
-urllib3==1.26.5
+requests==2.28.1
+urllib3==1.26.11
 websocket-client==0.56.0

Diff for: requirements.txt

@@ -10,28 +10,23 @@
 SOURCE_DIR = os.path.join(ROOT_DIR)
 
 requirements = [
-    'packaging',
+    'packaging >= 14.0',
+    'requests >= 2.26.0',
+    'urllib3 >= 1.26.0',
     'websocket-client >= 0.32.0',
-    'requests >= 2.14.2, != 2.18.0',
 ]
 
 extras_require = {
     # win32 APIs if on Windows (required for npipe support)
     ':sys_platform == "win32"': 'pywin32>=304',
 
-    # If using docker-py over TLS, highly recommend this option is
-    # pip-installed or pinned.
-
-    # TODO: if pip installing both "requests" and "requests[security]", the
-    # extra package from the "security" option are not installed (see
-    # https://github.com/pypa/pip/issues/4391).  Once that's fixed, instead of
-    # installing the extra dependencies, install the following instead:
-    # 'requests[security] >= 2.5.2, != 2.11.0, != 2.12.2'
-    'tls': ['pyOpenSSL>=17.5.0', 'cryptography>=3.4.7', 'idna>=2.0.0'],
+    # This is now a no-op, as similarly the requests[security] extra is
+    # a no-op as of requests 2.26.0, this is always available/by default now
+    # see https://github.com/psf/requests/pull/5867
+    'tls': [],
 
     # Only required when connecting using the ssh:// protocol
     'ssh': ['paramiko>=2.4.3'],
-
 }
 
 version = None

Diff for: setup.py

@@ -1,6 +1,6 @@
-setuptools==58.2.0
-coverage==6.0.1
+setuptools==63.2.0
+coverage==6.4.2
 flake8==4.0.1
-pytest==6.2.5
+pytest==7.1.2
 pytest-cov==3.0.0
-pytest-timeout==2.0.1
+pytest-timeout==2.1.0