Added support for newer versions

For future proofing

Author: ShonP40

mappings/metadata.schema.json

@@ -142,7 +142,17 @@
                 "1.7.*",
                 "1.8.*",
                 "1.7.10",
-                "1.8.9"
+                "1.8.9",
+                "1.9.*",
+                "1.10.*",
+                "1.11.*",
+                "1.12.*",
+                "1.16.*",
+                "1.17.*",
+                "1.18.*",
+                "1.19.*",
+                "1.20.*",
+                "1.21.*"
             ]
         },
         "MinecraftSubversion": {