message: fix(react): fix serializers
  * fix(react): fix serializers
  Fixes a bug in number/object serializers in our React wrapper generator
  where sending `null` yielded to `'null'` in string, where it should
  have been kept in `null` in object.
  * test(integration): change port for Angular Forms
diff: @@ -299,12 +299,12 @@ export const booleanSerializer = value => (!value ? undefined : '');
  * @param value A React prop value.
  * @returns Serialized version of React prop value, as a number attribute in a custom element.
  */
  -export const numberSerializer = value => String(value);
  +export const numberSerializer = value => (value == null ? value : String(value));
  /**
  * @param value A React prop value.
  * @returns Serialized version of React prop value, as a object attribute in a custom element.
  */
  -export const objectSerializer = JSON.stringify;
  +export const objectSerializer = value => (value == null ? value : JSON.stringify(value));
  export default createReactCustomElementType;
  