add :hidden to widget spec

src/formulare/core.clj

@@ -14,7 +14,7 @@
   (spec/or :empty empty?
            :options (spec/coll-of (spec/tuple string? string?))))
 (spec/def ::widget
-  #(in? [:input :select :checkbox :textarea :mselect] %))
+  #{:input :select :checkbox :textarea :mselect :hidden})
 (spec/def ::from-req
   (spec/and fn? #(= 1 (->> % meta :arglists (map count) first))))
 (spec/def ::to-form ::from-req)