createAction with creator with default value interpreted as empty return type

[david-shortman]

Minimal reproduction of the bug/regression with instructions:

Here's a reproduction of the type error being thrown in a TS playground (starting at line 112).

Expected behavior:

Creator with default value should be able to be supplied.

Versions of NgRx, Angular, Node, affected browser(s) and operating system(s):

Other information:

I would be willing to submit a PR to fix this issue

[x] Yes (Assistance is provided if you need help submitting a pull request)
[ ] No