✨ subscription shape

package.json

@@ -88,7 +88,7 @@
  "bundlesize": [
  {
  "path": "dist/final-form.umd.min.js",
- "maxSize": "5.0kB"
+ "maxSize": "5.02kB"
  },
  {
  "path": "dist/final-form.es.js",

src/subscriptionFilter.js

@@ -12,15 +12,45 @@ export default function<T: { [string]: any }>(
  keys.forEach(key => {
  if (subscription[key]) {
  dest[key] = src[key]
- if (
- !previous ||
- (~shallowEqualKeys.indexOf(key)
- ? !shallowEqual(src[key], previous[key])
- : src[key] !== previous[key])
+ if (!previous) {
+ different = true
+ } else if (
+ ~shallowEqualKeys.indexOf(key) &&
+ !shallowEqual(src[key], previous[key])
+ ) {
+ different = true
+ } else if (
+ ~['values', 'value'].indexOf(subscription[key]) &&
+ 'object' === typeof subscription[key]
  ) {
+ if (previous[key] && src[key]) {
+ different = checkDiffByShape(
+ src[key],
+ previous[key],
+ subscription[key]
+ )
+ } else {
+ different = src[key] !== previous[key]
+ }
+ } else if (src[key] !== previous[key]) {
  different = true
  }
  }
  })
  return different
 }
+
+function checkDiffByShape(a, b, shape) {
+ let different = false
+ Object.keys(shape).forEach(k => {
+ if (different) {
+ return
+ }
+ if ('object' === typeof shape[k]) {
+ different = different || checkDiffByShape(a[k], b[k], shape[k])
+ } else {
+ different = different || !shallowEqual(a[k], b[k])
+ }
+ })
+ return different
+}