Publishing `"SpecProcessed"` is not official support but is not apparant

[SEHI L'YI]

gosling.js/src/compiler/compile.ts

Lines 75 to 78 in c3169df

 publish('specProcessed', { 
     id: specCopy.id, 
     spec: specCopy 
 }); 

There was a discussion on this to rename alt-gosling:specProcessed which I think we should do before v1.0.0 #985