title: Boto3 deprecation warning on import
body: <p>I'm trying to use boto3 in a python/django project. I've done this before, but it's throwing me a warning when running localhost -- which is breaking the request I'm trying to run. I'm on python version 3.7. I've seen the issue raised in the GitHub repo for boto3, most referring to errors when running pytest. My issue doesn't seem to fall in line with the latest PR</p>
  
  <p><a href="https://github.com/boto/botocore/issues/1615" rel="nofollow noreferrer">https://github.com/boto/botocore/issues/1615</a></p>
  
  <p>I'm not too sure where to turn. Any advice is much appreciated.</p>
  
  <pre><code>    from . import urllib3
    File "/Users/neilballard/.local/share/virtualenvs/Volley-ldVCpc8_/lib/python3.7/site-packages/botocore/vendored/requests/packages/urllib3/__init__.py", line 10, in &lt;module&gt;
      from .connectionpool import (
    File "/Users/neilballard/.local/share/virtualenvs/Volley-ldVCpc8_/lib/python3.7/site-packages/botocore/vendored/requests/packages/urllib3/connectionpool.py", line 38, in &lt;module&gt;
      from .response import HTTPResponse
    File "/Users/neilballard/.local/share/virtualenvs/Volley-ldVCpc8_/lib/python3.7/site-packages/botocore/vendored/requests/packages/urllib3/response.py", line 9, in &lt;module&gt;
      from ._collections import HTTPHeaderDict
    File "/Users/neilballard/.local/share/virtualenvs/Volley-ldVCpc8_/lib/python3.7/site-packages/botocore/vendored/requests/packages/urllib3/_collections.py", line 1, in &lt;module&gt;
      from collections import Mapping, MutableMapping
    File "&lt;frozen importlib._bootstrap&gt;", line 1032, in _handle_fromlist
    File "/Users/neilballard/.local/share/virtualenvs/Volley-ldVCpc8_/lib/python3.7/collections/__init__.py", line 52, in __getattr__
      DeprecationWarning, stacklevel=2)
  DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated, and in 3.8 it will stop working
  </code></pre>
  
  <p>I've confirmed that "import boto3" is causing the issue. I've removed boto3, reinstalled, tried different version of boto3 &amp; urllib.</p>