Add tracker deps for subschemas so we see reactive validation errors with nested schemas

Author: lynchem

package/lib/ValidationContext.js

@@ -13,10 +13,20 @@ export default class ValidationContext {
     this._deps = {};
     const { tracker } = ss._constructorOptions;
     if (tracker) {
-      this._depsAny = new tracker.Dependency();
-      this._schemaKeys.forEach((key) => {
-        this._deps[key] = new tracker.Dependency();
-      });
+      const addDeps = (schema, keys = []) => {
+        Object.keys(schema).forEach(key => {
+          const schemaElement = schema[key];
+          schemaElement.type.definitions && schemaElement.type.definitions.forEach(def => {
+            if(typeof def.type === "object") {
+              addDeps(def.type._schema, keys.concat(key));
+            } else {
+              const fullKey = keys.concat(key).join(".");
+              this._deps[fullKey] = new tracker.Dependency();
+            }
+          })
+        });
+      }
+      addDeps(this._schema);
     }
   }