Add libuv as a dep

Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>

nodejs.yaml

@@ -40,6 +40,10 @@ data:
     - npm
   components:
     rpms:
+      libuv:
+        rationale: Platform abstraction layer for Node.js
+        ref: 1.20
+        buildorder: 0
       nodejs:
         rationale: Javascript runtime and npm package manager.
         ref: 10