requirements: add future

0xc0170 · 0xc0170 · commit f316373b9f51 · 2018-04-13T14:17:10.000+01:00
SHA 14255ca introduced the lines that are reported to be breaking. future module in requirements fixes it Reference: https://pypi.python.org/pypi/future Fixes #6489
diff --git a/requirements.txt b/requirements.txt
@@ -13,3 +13,4 @@ beautifulsoup4>=4
 fuzzywuzzy>=0.11
 pyelftools>=0.24
 jsonschema>=2.6
+future>=0.16.0
