fix: compatibility for React strict mode

[jlarmstrongiv]

See cpunion#39

[JackHowa]

hi @jlarmstrongiv ! I want to make sure this will still work as expected for the package users; are there test steps that you're working off of? happy to test this out locally

[JackHowa]

Looks like some of the tests fail. Let me know if you have time for this? I want to make sure this change is safe moving forward to react 17

lib/__tests__/index.test.js
    with children
      ✓ renders children (30 ms)
    with no children
      ✓ renders null (4 ms)
  ActionCableConsumer
    wrapped with ForwardRef
      ✓ renders the ForwardRef (6 ms)
      ✕ renders the consumer (126 ms)
      ✕ renders the controller (11 ms)
  ActionCableController
    with cable passed to provider
      ✕ passes cable to the controller as a prop (5 ms)
      with children
        ✕ renders children (7 ms)
      without children
        ✕ renders null (7 ms)

[JackHowa]

Didn't hear back on this; may be breaking change