Bump eventlet from 0.25.2 to 0.26.1 (#1002)

Bumps [eventlet](https://github.com/eventlet/eventlet) from 0.25.2 to 0.26.1.
- [Release notes](https://github.com/eventlet/eventlet/releases)
- [Changelog](https://github.com/eventlet/eventlet/blob/master/NEWS)
- [Commits](eventlet/eventlet@v0.25.2...v0.26.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

requirements.txt

@@ -26,7 +26,7 @@ git+https://github.com/metabrainz/brainzutils-python.git@v1.14.1
 git+https://github.com/metabrainz/data-set-hoster.git@v-2020-08-05.0#egg=datasethoster
 spotipy == 2.12.0
 pyyaml == 5.3.1
-eventlet == 0.25.2
+eventlet == 0.26.1
 Flask-CORS == 3.0.8
 uWSGI == 2.0.19.1
 nose == 1.3.7