0.7 Compatibility fix

Keno · Keno · commit c6e69bba0f4f · 2018-06-12T21:31:00.000-04:00
diff --git a/src/apps/checks/runs.jl b/src/apps/checks/runs.jl
@@ -1,4 +1,6 @@
 module Checks
+    using Nullables
+
     export Action, Image, Annotation, Output
 
     struct Action
