Added twine to Pipfile because it is required for doing PyPI release via invoke

tleonhardt · tleonhardt · commit 10786f7338be · 2019-08-12T21:17:37.000-04:00
diff --git a/Pipfile b/Pipfile
@@ -13,3 +13,4 @@ invoke = "*"
 ipython = "*"
 pytest = "*"
 pytest-cov = "*"
+twine = ">=1.11"
