Update wheel from 0.30.0 to 0.31.1

diff --git a/requirements.txt b/requirements.txt
index 42d88918551ec39e9440c381341a397e98819127..6774ca60ec79ee757e53d796058e3e351d611375 100644 (file)
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,4 +4,4 @@ pytest==3.5.0
 pytest-cov==2.5.1
 freezegun==0.3.10
 twine==1.11.0
-wheel==0.30.0
+wheel==0.31.1