Merge #4797

4797: Bump future from 0.18.2 to 0.18.3 in /doc/.sphinx r=newhoggy a=dependabot[bot]

Bumps [future](https://github.com/PythonCharmers/python-future) from 0.18.2 to 0.18.3.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/PythonCharmers/python-future/releases">future's releases</a>.</em></p>
<blockquote>
<h2>v0.18.3</h2>
<p>This is a minor bug-fix release containing a number of fixes:</p>
<ul>
<li>Backport fix for bpo-38804 (c91d70b)</li>
<li>Fix bug in fix_print.py fixer (dffc579)</li>
<li>Fix bug in fix_raise.py fixer (3401099)</li>
<li>Fix newint bool in py3 (fe645ba)</li>
<li>Fix bug in super() with metaclasses (6e27aac)</li>
<li>docs: fix simple typo, reqest -&gt; request (974eb1f)</li>
<li>Correct <strong>eq</strong> (c780bf5)</li>
<li>Pass if lint fails (2abe00d)</li>
<li>Update docker image and parcel out to constant variable.  Add comment to update version constant (45cf382)</li>
<li>fix order (f96a219)</li>
<li>Add flake8 to image (046ff18)</li>
<li>Make lint.sh executable (58cc984)</li>
<li>Add docker push to optimize CI (01e8440)</li>
<li>Build System (42b3025)</li>
<li>Add docs build status badge to README.md (3f40bd7)</li>
<li>Use same docs requirements in tox (18ecc5a)</li>
<li>Add docs/requirements.txt (5f9893f)</li>
<li>Add PY37_PLUS, PY38_PLUS, and PY39_PLUS (bee0247)</li>
<li>fix 2.6 test, better comment (ddedcb9)</li>
<li>fix 2.6 test (3f1ff7e)</li>
<li>remove nan test (4dbded1)</li>
<li>include list test values (e3f1a12)</li>
<li>fix other python2 test issues (c051026)</li>
<li>fix missing subTest (f006cad)</li>
<li>import from old imp library on older python versions (fc84fa8)</li>
<li>replace fstrings with format for python 3.4,3.5 (4a687ea)</li>
<li>minor style/spelling fixes (8302d8c)</li>
<li>improve cmp function, add unittest (0d95a40)</li>
<li>Pin typing==3.7.4.1 for Python 3.3 compatiblity (1a48f1b)</li>
<li>Fix various py26 unit test failures (9ca5a14)</li>
<li>Add initial contributing guide with docs build instruction (e55f915)</li>
<li>Add docs building to tox.ini (3ee9e7f)</li>
<li>Support NumPy's specialized int types in builtins.round (b4b54f0)</li>
<li>Added r&quot;&quot;&quot; to the docstring to avoid warnings in python3 (5f94572)</li>
<li>Add <strong>subclasscheck</strong> for past.types.basestring (c9bc0ff)</li>
<li>Correct example in README (681e78c)</li>
<li>Add simple documentation (6c6e3ae)</li>
<li>Add pre-commit hooks (a9c6a37)</li>
<li>Handling of <strong>next</strong> and next by future.utils.get_next was reversed (52b0ff9)</li>
<li>Add a test for our fix (461d77e)</li>
<li>Compare headers to correct definition of str (3eaa8fd)</li>
<li><a href="https://github-redirect.dependabot.com/PythonCharmers/python-future/issues/322">#322</a> Add support for negative ndigits in round; additionally, fixing a bug so that it handles passing in Decimal properly (a4911b9)</li>
<li>Add tkFileDialog to future.movers.tkinter (f6a6549)</li>
<li>Sort before comparing dicts in TestChainMap (6126997)</li>
<li>Fix typo (4dfa099)</li>
<li>Fix formatting in &quot;What's new&quot; (1663dfa)</li>
<li>Fix typo (4236061)</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/PythonCharmers/python-future/commit/af1db970b0879b59e7aeb798c27a623144561cff"><code>af1db97</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/PythonCharmers/python-future/issues/613">#613</a> from PythonCharmers/lwan/0.18.3-release</li>
<li><a href="https://github.com/PythonCharmers/python-future/commit/079ee9b75441d36447cec9981fa1b0032862f64d"><code>079ee9b</code></a> Prepare for 0.18.3 release</li>
<li><a href="https://github.com/PythonCharmers/python-future/commit/02f7a8143d5b68f50a1cca44d8f5a58c1925a515"><code>02f7a81</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/PythonCharmers/python-future/issues/610">#610</a> from wshanks/wshanks-patch-1</li>
<li><a href="https://github.com/PythonCharmers/python-future/commit/c91d70b34ef0402aef3e9d04364ba98509dca76f"><code>c91d70b</code></a> Backport fix for bpo-38804</li>
<li><a href="https://github.com/PythonCharmers/python-future/commit/80523f383fbba1c6de0551e19d0277e73e69573c"><code>80523f3</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/PythonCharmers/python-future/issues/569">#569</a> from jmadler/master</li>
<li><a href="https://github.com/PythonCharmers/python-future/commit/5e5af71549c7a7fa0e28f881046e081e231e455d"><code>5e5af71</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/PythonCharmers/python-future/issues/582">#582</a> from r3m0t/patch-6</li>
<li><a href="https://github.com/PythonCharmers/python-future/commit/17e4bbd7c676a9a8efd20601e51675c95f74b330"><code>17e4bbd</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/PythonCharmers/python-future/issues/596">#596</a> from abjonnes/fix-print-trailing-comma</li>
<li><a href="https://github.com/PythonCharmers/python-future/commit/1b427ba70191927706282840835e31ae0733ee7e"><code>1b427ba</code></a> Merge branch 'xZise-official-count' into master</li>
<li><a href="https://github.com/PythonCharmers/python-future/commit/c8eb497336c76d300c6753b47c7f5de505660d7a"><code>c8eb497</code></a> Merge branch 'official-count' of <a href="https://github.com/xZise/python-future">https://github.com/xZise/python-future</a> into ...</li>
<li><a href="https://github.com/PythonCharmers/python-future/commit/dffc579dbb7c882fc01fa0c0dfa6b59acef7827d"><code>dffc579</code></a> Fix bug in fix_print.py fixer</li>
<li>Additional commits viewable in <a href="https://github.com/PythonCharmers/python-future/compare/v0.18.2...v0.18.3">compare view</a></li>
</ul>
</details>
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doc/.sphinx/requirements.txt

@@ -15,7 +15,7 @@ sphinxemoji==0.1.6
 sphinx_markdown_tables==0.0.15
 CommonMark==0.9.1
 docutils==0.16
-future==0.18.2
+future==0.18.3
 idna==2.9
 imagesize==1.2.0
 Jinja2==2.11.3