CompatHelper: add new compat entry for "JuMP" at version "0.21"

github-actions[bot] · github-actions[bot] · commit 67ede47c882d · 2021-05-07T00:06:29.000Z
diff --git a/Project.toml b/Project.toml
@@ -5,3 +5,6 @@ version = "0.1.0"
 
 [deps]
 JuMP = "4076af6c-e467-56ae-b986-b466b2749572"
+
+[compat]
+JuMP = "0.21"
