Description of change

Fixes #9 through the implementation of the following logic:

• If the ws is closing or closed, it does not try performing the call. Instead, it immediately falls back.
• If the ws is still connecting, it immediately falls back. If the fallbacks fail, it'll perform the call using the provided ws providers (that were in the connecting state) in reverse order.

Other changes:

• Introduces a new dependency: await-timeout
  • Reason: Test cases using the old promiseWithTimeout failed with odd behavior. They work nicely using await-timeout.

Pull-Request Checklist

• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change
• The new commits follow conventions outlined in the conventional commit spec