change required and spec to be optional field keys

src/wanijo/framework/form.clj

@@ -18,13 +18,13 @@
   (spec/and fn? #(= 1 (->> % meta :arglists (map count) first))))
 (spec/def ::to-form ::from-req)
 (spec/def ::field
-  (spec/keys :req-un [::label
+  (spec/keys :req-un [::label]
-                      ::required
-                      ::spec]
              :opt-un [::options
                       ::widget
                       ::from-req
-                      ::to-form]))
+                      ::to-form
+                      ::required
+                      ::spec]))
 (spec/def ::fields
   (spec/map-of keyword? ::field))
 (spec/def ::form