While `dalli` doesn't depend on `resolv-replace`, we want to ensure it
still works if it is required by the host application.

This regression test ensures we don't break compatibility, and adds a
framework allowing us to test compatibility with other gems in the
future.

Similarly to `resolv-replace`, `sockify` monkey patches
`TCPSocket#initialize` which causes an error if it is called with
`connect_timeout:`.

Rather than check only for `resolv-replace`'s specific method, we can
check if if the method's parameters have changed.