Update to latest f28, and make it build on F29+

mysql.yaml

@@ -1,6 +1,6 @@
 ---
 document: modulemd
-version: 1
+version: 2
 data:
     summary: MySQL Module
     description: MySQL is a multi-user, multi-threaded SQL database server.
@@ -11,10 +11,10 @@ data:
     license:
         module: [MIT]
     dependencies:
-        buildrequires:
-            platform: f28
-        requires:
-            platform: f28
+        - buildrequires:
+              platform: [-f28]
+          requires:
+              platform: [-f28]
     references:
         community: https://docs.pagure.org/modularity/
         documentation: https://github.com/container-images/mariadb/
@@ -42,5 +42,5 @@ data:
         rpms:
             community-mysql:
                 rationale: MySQL package.
-                ref: 36221519
+                ref: 58939b89 # latest f28 branch
                 buildorder: 10