message: feat: add changed flag to the observer slot closes
diff: @@ -14,7 +14,8 @@ const flagMergingStrategy: {
  valid: 'every',
  invalid: 'some',
  pending: 'some',
  - validated: 'every'
  + validated: 'every',
  + changed: 'some'
  };
  function mergeFlags(lhs: any, rhs: any, strategy: string) {
  