Update to modulemd v2.

ruby.yaml

@@ -1,7 +1,7 @@
 # Keep a generated ruby.yaml file URL here to follow latest configuration.
 # https://github.com/fedora-modularity/dependency-report/blob/master/modules/ruby/ruby.yaml
 document: modulemd
-version: 1
+version: 2
 data:
     # From ruby.spec Summary
     summary: An interpreter of object-oriented scripting language
@@ -19,10 +19,10 @@ data:
         documentation: https://www.ruby-lang.org/en/documentation/
         tracker: https://bugs.ruby-lang.org/
     dependencies:
-        buildrequires:
-            platform: f28
-        requires:
-            platform: f28
+        - buildrequires:
+            platform: [f29]
+          requires:
+            platform: [f29]
     components:
         # SRPMs
         rpms: