Update version to v0.12.0 (#174)

Author: janmasrovira

Package.juvix

@@ -8,8 +8,8 @@ package : Package :=
     version :=
       mkVersion@{
         major := 0;
-        minor := 11;
-        patch := 1;
+        minor := 12;
+        patch := 0;
         release := nothing;
       };
     dependencies := [];