Re-add lost requirement

oli-obk · oli-obk · commit c7a5866788cf · 2020-08-09T01:37:16.000+02:00
diff --git a/src/skill_tree.md b/src/skill_tree.md
@@ -124,6 +124,7 @@ name = "mutex_new"
 label = "Mutex::new"
 href = "https://github.com/rust-lang/rust/issues/66806"
 items = []
+requires = ["parking_lot"]
 
 [[group]]
 name = "parking_lot"
