Loosen dev dependencies (flake8, isort, twine)

tony · tony · commit 540e15b2d25f · 2019-12-24T16:03:00.000-06:00
diff --git a/requirements/dev.txt b/requirements/dev.txt
@@ -1,3 +1,3 @@
-isort>=4.3.4
-flake8>=3.5.0
-twine>=1.13.0
+isort<5
+flake8<4
+twine
