Bump future from 0.18.2 to 0.18.3 (#266) (#268)

Bumps [future](https://github.com/PythonCharmers/python-future) from 0.18.2 to 0.18.3.
- [Release notes](https://github.com/PythonCharmers/python-future/releases)
- [Changelog](https://github.com/PythonCharmers/python-future/blob/master/docs/changelog.rst)
- [Commits](PythonCharmers/python-future@v0.18.2...v0.18.3)

---
updated-dependencies:
- dependency-name: future
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -27,7 +27,7 @@ django-nose==1.4.5
 dnspython==2.2.0
 eventlet==0.33.0
 filelock==3.4.0
-future==0.18.2
+future==0.18.3
 greenlet==1.1.2
 identify==2.4.0
 idna==2.8