Update pipenv from 2018.6.25 to 2018.7.1

pyup-bot · davehunt · commit f331ba3bbed4 · 2018-07-02T07:12:11.000-07:00
diff --git a/pipenv.txt b/pipenv.txt
@@ -1 +1 @@
-pipenv==2018.6.25
+pipenv==2018.7.1
